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A random-walk benchmark for single-electron circuits
David Reifert, Martins Kokainis, Andris Ambainis, Vyacheslavs Kashcheyevs & Niels Ubbelohde
Nature Communications 12, 285 (2021) 

Einzelelektronenschaltungen mit ballistischen heißen Elektronen
Lars Freise
Dissertation, PTB-Bericht PTB-E-119, ISBN 978-3-95606-620-7

Unraveling the origin of local variations in the step resistance of epitaxial graphene on SiC: a quantitative scanning tunneling potentiometry study
Anna Sinterhauf, Georg A.Traeger, Davood Momeni, Klaus Pierz, Hans Werner Schumacher, and Martin Wenderoth
Carbon 184, 463 - 469 (2021)

Relevance of weak and strong classical scattering for the giant negative magnetoresistance in two-dimensional electron gases
B. Horn-Cosfeld, J. Schluck, J. Lammert, M. Cerchez, T. Heinzel, K. Pierz, H. W. Schumacher, and D. Mailly
Phys. Rev. B 104, 045306 (2021)

Graphene quantum Hall effect devices for AC and DC electrical metrology
Mattias Kruskopf, Stephan Bauer, Yaowaret Pimsut, Atasi Chatterjee, Dinesh K. Patel, Albert F. Rigosi, Randolph E. Elmquist, Klaus Pierz, Eckart Pesel, Martin Götz, and Jürgen Schurr
IEEE Transactions on Electron Devices: 68 (7), 3672 - 3677 (2021)

Non-conventional bell-shaped diffuse scattering in low-energy electron diffraction from high-quality epitaxial 2D-materials
K. Omambac,  M. Kriegel,  C. Brand, B. Finke,  L. Kremeyer, H. Hattab,  D. Janoschka,  P. Dreher,  F.-J. Meyer zu Heringdorf,  D. Momeni Pakdehi,  K. Pierz, H. W. Schumacher,  M. Petrović,  A. van Houselt, B. Poelsema,  M. C. Tringides, and  M. Horn-von Hoegen
Appl. Phys. Lett. 118, 241902 (2021)

Liquid metal intercalation of epitaxial graphene: Large-area gallenene layer fabrication through gallium self-propagation at ambient conditions
S. Wundrack, D. Momeni, W. Dempwolf, N. Schmidt, K. Pierz, L. Michaliszyn, H. Spende, A. Schmidt, H. W. Schumacher, R. Stosch, and A. Bakin
Phys. Rev. Materials 5, 024006 (2021)

Non-adiabatic single-electron pumps in a dopant-free GaAs/AlGaAs 2DEG
B. Buonacorsi,  F. Sfigakis,  A. Shetty,  M. C. Tam,  H. S. Kim,  S. R. Harrigan,  F. Hohls,  M. E. Reimer,  Z. R. Wasilewski, and  J. Baugh
Appl. Phys. Lett. 119, 114001 (2021) 

Roadmap on quantum nanotechnologies
Arne Laucht, Frank Hohls, Niels Ubbelohde et al.
Nanotechnology 32 (16), 1 (2021)

Trapping and Counting Ballistic Nonequilibrium Electrons
Lars Freise, Thomas Gerster, David Reifert, Thomas Weimann, Klaus Pierz, Frank Hohls, and Niels Ubbelohde
Phys. Rev. Lett. 124, 127701 (2020)

Silicon Carbide Stacking-Order-Induced Doping Variation in Epitaxial Graphene
Davood Momeni Pakdehi, Philip Schädlich, Thi Thuy Nhung Nguyen, Alexei A. Zakharov, Stefan Wundrack, Emad Najafidehaghani, Florian Speck, Klaus Pierz, Thomas Seyller, Christoph Tegenkamp, Hans Werner Schumacher
Advanced Functional Materials 30, 2004695 (2020)

Effect of background scattering on the magnetoconductance of two-dimensional Lorentz gases
B. Horn-Cosfeld, J. Schluck, A. Röben, M. Cerchez, K. Pierz, H. W. Schumacher, D. Mailly and T. Heinzel
Europhysics Letters, 128, 67004 (2020)

Traceably calibrated scanning Hall probe microscopy at room temperature
Manuela Gerken, Aurélie Solignac, Davood Momeni Pakdehi, Alessandra Manzin, Thomas Weimann, Klaus Pierz, Sibylle Sievers, and Hans Werner Schumacher
J. Sens. Sens. Syst. 9, 391–399 (2020)

Anomalous transport due to retroreflection
René Lohmann, Beate Horn-Cosfeld, Jakob Schluck, Dominique Mailly, Nima H. Siboni, Hans W. Schumacher, Klaus Pierz, Thomas Heinzel, and Jürgen Horbach
Phys. Rev. B 102, 081302(R) (2020)

Substrate induced nanoscale resistance variation in epitaxial graphene
Anna Sinterhauf, Georg A. Traeger, Davood Momeni Pakdehi, Philip Schädlich, Philip Willke, Florian Speck, Thomas Seyller, Christoph Tegenkamp, Klaus Pierz, Hans Werner Schumacher, and Martin Wenderoth
Nature Communications 11, 555 (2020)

Minimum Resistance Anisotropy of Epitaxial Graphene on SiC
D. Momeni Pakdehi, J. Aprojanz, A. Sinterhauf, K. Pierz, M. Kruskopf, P. Willke, J. Baringhaus, J. P. Stöckmann, G. A. Traeger, F. Hohls, C. Tegenkamp, M. Wenderoth, F. J. Ahlers, and H. W. Schumacher
ACS Applied Materials and Interfaces 10 , 6039 - 6045 (2018)

A morphology study on the epitaxial growth of graphene and its buffer layer
Mattias Kruskopf, Klaus Pierz, Davood Momeni Pakdehi, StefanWundrack, RainerStosch, AndreyBakin, Hans W.Schumacher
Thin Solid Films 659, 7-15 (2018)

Time-Domain Characterization of High-Speed Photodetectors
Paul Struszewski, Klaus Pierz & Mark Bieler 
Journal of Infrared, Millimeter, and Terahertz Waves 38, 1416–1431 (2017)

Linear negative magnetoresistance in two-dimensional Lorentz gases
J. Schluck, M. Hund, T. Heckenthaler, T. Heinzel, N. H. Siboni, J. Horbach, K. Pierz, H. W. Schumacher, D. Kazazis, U. Gennser, and D. Mailly
Phys. Rev. B 97, 115301 (2018)

Investigation of a possible electronic phase separation in the magnetic semiconductors Ga_1-xMn_xAs and Ga_1-xMn_xP by means of fluctuation spectroscopy
Martin Lonsky, Jan Teschabai-Oglu, Klaus Pierz, Sibylle Sievers, Hans Werner Schumacher, Ye Yuan, Roman Böttger, Shengqiang Zhou, and Jens Müller
Phys. Rev. B 97, 054413 (2018)

Nonmonotonic Classical Magnetoconductivity of a Two-Dimensional Electron Gas in a Disordered Array of Obstacles
N. H. Siboni, J. Schluck, K. Pierz, H. W. Schumacher, D. Kazazis, J. Horbach, and T. Heinzel
Phys. Rev. Lett. 120, 056601 (2018)

Infrared Nanospectroscopy of Phospholipid and Surfactin Monolayer Domains
Bernd Kästner, C. Magnus Johnson, Peter Hermann, Mattias Kruskopf, Klaus Pierz, Arne Hoehl, Andrea Hornemann, Georg Ulrich, Jakob Fehmel, Piotr Patoka, Eckart Rühl, and Gerhard Ulm
ACS Omega 3, 4141–4147 (2018)

Quantum signatures of competing electron trajectories in antidot superlattices
J. Schluck, J. Feilhauer, K. Pierz, H. W. Schumacher, D. Kazazis, U. Gennser, and T. Heinzel
Phys. Rev. B 98, 165415 (2018)

Compressed sensing FTIR nano-spectroscopy and nano-imaging
Bernd Kästner, Franko Schmähling, Andrea Hornemann, Georg Ulrich, Arne Hoehl, Mattias Kruskopf, Klaus Pierz, Markus B. Raschke, Gerd Wübbeler, and Clemens Elster
Optics Express 26, 18115-18124 (2018)

Robustness of single-electron pumps at sub-ppm current accuracy level
F Stein, H Scherer, T Gerster, R Behr, M Götz, E Pesel, C Leicht, N Ubbelohde, T Weimann, K Pierz, H W Schumacher and F Hohls
Metrologia 54 (1), S1 (2017)

Direct comparison of fractional and integer quantized Hall resistance
Franz J Ahlers, Martin Götz and Klaus Pierz
Metrologia 54, 516 (2017)

Magnetocapacitance and dissipation factor of epitaxial graphene-based quantum Hall effect devices
J. Schurr, C.-C. Kalmbach, F. J. Ahlers, F. Hohls, M. Kruskopf, A. Müller, K. Pierz, T. Bergsten, and R. J. Haug
Phys. Rev. B 96, 155443 (2017)

Commensurability oscillations by snake-orbit magnetotransport in two-dimensional electron gases
A. Leuschner, J. Schluck, M. Cerchez, T. Heinzel, K. Pierz, and H. W. Schumacher
Phys. Rev. B 95, 155440 (2017)

Dopant-controlled single-electron pumping through a metallic island
Tobias Wenz, Frank Hohls, Xavier Jehl, Marc Sanquer, Sylvain Barraud, Jevgeny Klochan, Girts Barinovs, and  Vyacheslavs Kashcheyevs
Appl. Phys. Lett. 108, 213107 (2016) 

Herstellung von Graphen für die Metrologie
Klaus Pierz and Mattias Kruskopf
PTB-Mitteilungen 126, 3, 41 - 48 (2016)

Comeback of epitaxial graphene for electronics: large-area growth of bilayer-free graphene on SiC
Mattias Kruskopf, Davood Momeni Pakdehi, Klaus Pierz, Stefan Wundrack, Rainer Stosch, Thorsten Dziomba, Martin Götz, Jens Baringhaus, Johannes Aprojanz, Christoph Tegenkamp, Jakob Lidzba, Thomas Seyller, Frank Hohls, Franz J Ahlers and Hans W Schumacher
2D Materials 3, 041002 (2016)

Nonequilibrium mesoscopic conductance fluctuations as the origin of 1/f noise in epitaxial graphene
C.-C. Kalmbach, F. J. Ahlers, J. Schurr, A. Müller, J. Feilhauer, M. Kruskopf, K. Pierz, F. Hohls, and R. J. Haug
Phys. Rev. B 94, 205430 (2016)

Ultrafast magneto-photocurrents as probe of anisotropy relaxation in GaAs
Christian B. Schmidt, Shekhar Priyadarshi, Klaus Pierz, and Mark Bieler
Appl. Phys. Lett. 108, 102104 (2016) 

Probing magnetic microstructures with quasi-ballistic Hall crosses
S. Fasbender, J. Schluck, M. Cerchez, T. Heinzel, S. Sievers, K. Pierz, and H. W. Schumacher
Journal of Applied Physics 119, 094302 (2016) 

Validation of a quantized-current source with 0.2 ppm uncertainty
Friederike Stein, Dietmar Drung, Lukas Fricke,  Hansjörg Scherer, Frank Hohls, Christoph Leicht, Martin Götz, Christian Krause, Ralf Behr, Eckart Pesel, Klaus Pierz, Uwe Siegner, Franz J. Ahlers, and Hans W. Schumacher
Appl. Phys. Lett. 107, 103501 (2015) 

Partitioning of on-demand electron pairs
Niels Ubbelohde, Frank Hohls, Vyacheslavs Kashcheyevs, Timo Wagner, Lukas Fricke, Bernd Kästner, Klaus Pierz, Hans W. Schumacher and Rolf J. Haug
Nature Nanotechnology 10, 46–49 (2015)

Die Kunst des Elektronenzählens - Neudefinition des Amperes mit Einzel-Elektronenquellen
Lukas Fricke, Ralf Dolata, Bernd Kästner, Frank Hohls, Hans Werner Schumacher
Physik in unserer Zeit 46 (2), 70 - 76 (2015)

Epitaxial graphene on SiC: modification of structural and electron transport properties by substrate pretreatment
Mattias Kruskopf, Klaus Pierz, Stefan Wundrack, Rainer Stosch, Thorsten Dziomba, Cay-Christian Kalmbach, André Müller, Jens Baringhaus, Christoph Tegenkamp, Franz J Ahlers and Hans W Schumacher
Journal of Physics: Condensed Matter, 27 (18), 185303 (2015)

Detection of the Anomalous Velocity with Subpicosecond Time Resolution in Semiconductor Nanostructures
Shekhar Priyadarshi, Klaus Pierz, and Mark Bieler
Phys. Rev. Lett. 115, 257401 (2015)

Time-Domain Optoelectronic Vector Network Analysis on Coplanar Waveguides
Mark Bieler, Heiko Füser and Klaus Pierz
IEEE Transactions on Microwave Theory and Techniques 63 (11), 3775 - 3784 (2015)

Self-Referenced Single-Electron Quantized Current Source
Lukas Fricke, Michael Wulf, Bernd Kaestner, Frank Hohls, Philipp Mirovsky, Brigitte Mackrodt, Ralf Dolata, Thomas Weimann, Klaus Pierz, Uwe Siegner, and Hans W. Schumacher
Phys. Rev. Lett. 112, 226803 (2014)

Bilayer graphene quantum dot defined by topgates
André Müller, Bernd Kaestner, Frank Hohls, Thomas Weimann, Klaus Pierz, and Hans W. Schumacher
Journal of Applied Physics 115, 233710 (2014) 

Magnetotransport and magnetization dynamics of GaMnAs thin films and magnetic tunnel junctions
Aymen Ben Hamida, Sibylle Sievers, Florian Bergmann, Ana-Maria Racu, Mark Bieler, Klaus Pierz, and Hans Werner Schumacher
Physica Status Solidi B 251 (9), 1652 - 1662 (2014)

Magnetocapacitance and loss factor of GaAs quantum Hall effect devices
J Schurr, F Ahlers and K Pierz
Metrologia 51, 235 (2014)

Optical Spin Noise of a Single Hole Spin Localized in an (InGa)As Quantum Dot
Ramin Dahbashi, Jens Hübner, Fabian Berski, Klaus Pierz, and Michael Oestreich
Phys. Rev. Lett. 112, 156601 (2014)

Harmonic Oscillator Wave Functions of a Self-Assembled InAs Quantum Dot Measured by Scanning Tunneling Microscopy
K. Teichmann, M. Wenderoth, H. Prüser, K. Pierz, H. W. Schumacher, and R. G. Ulbrich
Nano Lett. 13, 3571 (2013).

Counting Statistics for Electron Capture in a Dynamic Quantum Dot
Lukas Fricke, Michael Wulf, Bernd Kaestner, Vyacheslavs Kashcheyevs, Janis Timoshenko, Pavel Nazarov, Frank Hohls, Philipp Mirovsky, Brigitte Mackrodt, Ralf Dolata, Thomas Weimann, Klaus Pierz, and Hans W. Schumacher
Phys. Rev. Lett. 110 126803 (2013).

Towards quantized current arbitrary wave form synthesis
P. Mirovsky, L. Fricke, F. Hohls, B. Kaestner, C. Leicht, K. Pierz, J. Melcher, and H. W. Schumacher
J. Appl. Phys. 113 213704 (2013).

Error accounting algorithm for electron counting experiments
Michael Wulf
Phys. Rev. B 87 035312 (2013).

Broadband ferromagnetic resonance characterization of GaMnAs thin films
A. Ben Hamida, S. Sievers, K. Pierz, and H. W. Schumacher
Journal of Applied Physics 114, 123704 (2013) 

All-optically induced currents resulting from frequency-modulated coherent polarization
Shekhar Priyadarshia, Klaus Pierz, and Mark Bieler
Appl. Phys. Lett. 102, 112102 (2013)

Anisotropic homogeneous linewidth of the heavy-hole exciton in (110)-oriented GaAs quantum wells
Rohan Singh, Travis M. Autry, Gaël Nardin, Galan Moody, Hebin Li, Klaus Pierz, Mark Bieler, and Steven T. Cundiff
Phys. Rev. B 88, 045304 (2013)

Impact of current paths on measurement of tunneling magnetoresistance and spin torque critical current densities in GaMnAs-based magnetic tunnel junctions
A. Ben Hamida, F. Bergmann, K. Pierz, and H. W. Schumacher
Journal of Applied Physics 113, 083702 (2013)

Spin-dependent shot noise enhancement in a quantum dot
Niels Ubbelohde, Christian Fricke, Frank Hohls, and Rolf J. Haug
Phys. Rev. B 88, 041304(R) (2013)

Measurement of heavy-hole spin dephasing in (InGa)As quantum dots
R. Dahbashi, J. Hubner, F. Berski, J. Wiegand, X. Marie, K. Pierz, H. W. Schumacher, and M. Oestreich
Appl. Phys. Lett. 100 031906 (2012).

Precision quantization of Hall resistance in transferred graphene
M. Woszczyna, M. Friedemann, M. Götz, E. Pesel, K. Pierz, T. Weimann, and F. J. Ahlers
Appl. Phys. Lett. 100 164106 (2012).

Magnetic and transport properties of as-grown and annealed GaMnAs thick layers
A. Ben-Hamida, N. Liebig, S. Serrano-Guisan, S. Sievers, K. Pierz, H. W. Schumacher
Journal of the Magnetics Society of Japan 36 49 (2012).

Optoelectronic time-domain characterization of a 100 GHz sampling oscilloscope
H. Füser, S. Eichstädt, K. Baaske, C. Elster, K. Kuhlmann, R. Judaschke, K. Pierz, and M. Bieler
Measurement Science and Technology 23 025201 (2012).

Integrated quantized electronics: a semiconductor quantized voltage source
Frank Hohls, Armin C. Welker, Christoph Leicht, Lukas Fricke, Bernd Kaestner, Philipp Mirovsky, Andre Müller, Klaus Pierz, Uwe Siegner and  Hans Werner Schumacher
Phys. Rev. Lett. 109, 056802 (2012).

All-Optically Induced Ultrafast Photocurrents: Beyond the Instantaneous Coherent Response
Shekhar Priyadarshi, Klaus Pierz, and Mark Bieler
Phys. Rev. Lett. 109, 216601 (2012)

Strong quantum memory at resonant Fermi edges revealed by shot noise
N. Ubbelohde, K. Roszak, F. Hohls, N. Maire, R. J. Haug and T. Novotný
Scientific Reports 2, 374 (2012)

Measurement of finite-frequency current statistics in a single-electron transistor
Niels Ubbelohde, Christian Fricke, Christian Flindt, Frank Hohls and Rolf J. Haug
Nature Communications 3, 612 (2012) 

Generation of energy selective excitations in quantum Hall edge states
C. Leicht, P. Mirovsky, B. Kaestner, F. Hohls, V. Kashcheyevs, E. V. Kurganova, U. Zeitler, T. Weimann, K. Pierz and H. W. Schumacher
Semiconductor Science and Technology 26, 055010 (2011).

Quantized current source with mesoscopic feedback
L. Fricke, F. Hohls, N. Ubbelohde, B. Kaestner, V. Kashcheyevs, C. Leicht, P. Mirovsky, K. Pierz, H. W. Schumacher and R. Haug
Phys. Rev. B 83, 193306 (2011).

The quantum Hall impedance standard
J. Schurr, J. Kucera, K. Pierz and B. Kibble
Metrologia 48, 47 (2011).

All-optical generation of coherent in-plane charge oscillations in GaAs quantum wells
Shekhar Priyadarshi, Klaus Pierz, Uwe Siegner, Philip Dawson, and Mark Bieler
Phys. Rev. B 83, 121307(R) (2011)

2010

A Molecular Quantized Charge Pump
V. Siegle, C.-W. Liang, B. Kaestner, H. W. Schumacher, F. Jessen, D. Koelle, R. Kleiner and S. Roth
Nano Letters 10, 3841 (2010).

Universal decay cascade model for dynamical quantum dot initialization
V. Kashcheyevs and B. Kaestner:
Phys. Rev. Lett. 104, 186805 (2010).

The effect of structural parameters and growth temperature on the electron density in asymmetric double-2DEGs
K. Pierz, G. Hein, B. Schumacher, E. Pesel, H. W. Schumacher
Semiconductors, Science & Technology 25 (2010) 035014

Synchronized single electron emission from dynamical quantum dots
P. Mirovsky, B. Kästner, C. Leicht, A.C. Welker, T. Weimann, K. Pierz and H.W. Schumacher
Applied Physics Letters  97, 252104 (2010)

Reversal of coherently controlled ultrafast photocurrents by band mixing in undoped GaAs quantum wells
S. Priyadarshi, A. M.  Racu, K. Pierz, U. Siegner, M. Bieler, H. T. Duc, J. Förstner, T. Meier
Physical Review Letters 104 (2010)  217401

All-optical generation of coherent in-plane charge oscillations in GaAs quantum wells
S. Priyadarshi, K. Pierz, U. Siegner, P. Dawson, M. Bieler
Physical Review B 83 (2011)  121307(R) 

2009

Single-parameter quantized charge pumping in high magnetic fields
B. Kaestner, C. Leicht, V. Kashcheyevs, K. Pierz, U. Siegner and H. W. Schumacher
Appl. Phys. Lett. 94, 012106 (2009).

Non-adiabatic pumping of single electrons affected by magnetic fields
C. Leicht, B. Kaestner, V. Kashcheyevs, P. Mirovsky, T. Weimann, K. Pierz and H. W. Schumacher
Physica E 42, 911 (2009).

Spatially resolved measurements  of depletion properties of large gate two-dimensional electron gas semiconductors terahetz modulators
T. Kleine-Ostmann, K. Pierz, G. Hein, P. Dawson, M. Marso, and M. Koch
Journal of Applied Physics 105 (2009) 093707

Improved optoelectronic technique for the time-domain characterization of sampling oscilloscopes
M. Bieler, M. Spitzer, K. Pierz, and U. Siegner
IEEE Transactions on Instrumentation and Measurement: 58, 4 (2009) 1065 – 1071

Controlling losses with gates and shields to perfect a quantum Hall impedance standard
J. Schurr, B.P. Kibble, G. Hein, K. Pierz
IEEE Transactions on Instrumentation and Measurement: 58, 4 (2009)  973 – 979

Simultaneous generation and detection of ultrashort voltage pulses in low-temperature grown GaAs with below-bandgab laser pulses
M. Bieler, K. Pierz, and U. Siegner
Applied Physics Letters 94 (2009) 051108

Graphene on gallium arsenide: Engeneering the visibility
M. Friedemann,  K. Pierz, R. Stosch, and F.J. Ahlers
Applied Physics Letters 95 (2009) 102103

THz spectroscopy of shift currents resulting from asymmetric (110)-oriented GaAs/AlGaAs quantum wells
S. Priyadarshi, M. Leidinger, K. Pierz, A. M. Racu,  U. Siegner, M. Bieler, P. Dawson
Applied Physics Letters 95 (2009) 151110

2008

Robust single-parameter quantized charge pumping
B. Kaestner, V. Kashcheyevs, G. Hein, K. Pierz, U. Siegner, H. W. Schumacher
Appl. Phys. Lett. 92, 192106 (2008).

Non-adiabatic single-parameter quantized charge pumping
B. Kaestner, V. Kashcheyevs, S. Amakawa, M.D. Blumenthal, L. Li, T.J.B.M. Janssen, G. Hein, K. Pierz, T. Weimann, U. Siegner, H.W. Schumacher
Phys. Rev. B 77, 153301 (2008).

Electron pumping through quantum dots defined in parallel etched quantum wires
M. D. Blumenthal, B. Kaestner, L. Li, S. Giblin, T.J.B.M. Janssen, M. Pepper, D. Anderson, G. Jones and D.A. Ritchie:
Microelectronics Journal 39, 365 (2008).

Noise measurements of a quantized charge pump
N. Maire, F. Hohls, B. Kaestner, K. Pierz, H. W. Schumacher, and R. J. Haug:
Appl. Phys. Lett. 92, 082112 (2008).

Theoretical and experimental investigations of Coulomb blockade in coupled quantum dot systems
F. J. Kaiser, S. Kohler, P. Hänggi, M. Malecha, J. Ebbecke, A. Wixforth, H. W. Schumacher, B. Kaestner, D. Reuter and A. D. Wieck:
J. Phys.: Condens. Matter 20, 374108 (2008).

Asymmetric double two-dimensional electron gas structures for electrical quantum metrology
K. Pierz, G. Hein, E. Pesel, B. Schumacher, H. W. Schumacher and U. Siegner
Applied Physics Letters 92 (2008) 133509

Piezoelectric exciton acoustic-phonon coupling in single quantum dots
D. Sarkar, H.P. van der Meulen, J.M. Calleja, J.M. Meyer, R.J. Haug, and K. Pierz
Phys. Rev. B 78 (2008) 241305

Resonant optical excitation of longitudinal-optical phonons and intermixing in InAs/AlAs single quantum dots
D. Sarkar, H.P. van der Meulen, J.M. Calleja, J.M. Meyer, R.J. Haug, and K. Pierz
Applied Physics Letters 92 (2008) 181909

2007

Gigahertz quantized charge pumping
M. D. Blumenthal, B. Kaestner, L. Li, S. Giblin, T. J. B. M. Janssen, M. Pepper, D. Anderson, G. Jones, D.A. Ritchie:
Nature Physics 3, 343 (2007).

Rise-time Calibration of 50 GHz Sampling Oscilloscopes: Intercomparison between PTB and NPL
M. Bieler, S. Seitz, M. Spitzer, G. Hein, K. Pierz, U. Siegner, M.A. Basu, A.J.A. Smith, and M.R. Harper
IEEE Trans. Instrum. Meas. 56, 2007, 266

The ac quantum Hall effect as a primary standard of ompedance
J. Schurr, F.-J. Ahlers, G. Hein, K. Pierz
Metrologia 44, 1 (2007) 15-23

Optical properties of  InAs/AlAs self-assembled  quantum dots
D. Sarkar, J. M. Calleja, H. P. van der Meulen, J. M. Becker, R. J. Haug, K. Pierz
Materials Science Forum 555, 2007, 9-17

Super-Poissonian shot noise in tunneling through coupled self-assembled InAs quantum dots
P. Barthold, F. Hohls, N. MAire, K. Pierz and R.J. Haug
AIP Conf. Proc. 893 (2007) 815

Noise at a Fermi-edge singularity in self-assembled InAs quantum dots
N. Maire, F. Hohls, T. Lüdtke, K. Pierz R.J. Haug
Physical Review B 75, 2007, 233304

Relaxation and recombination in InAs quantum dots
P. Dawson, E. O. Göbel, K. Pierz, O. Rubel, S. D. Baranovskii, P. Thomas
phys. stat. sol. b, 224 (2007) 2803-2815

Surface acoustic wave mediated effects in a coupled multi quantum well
J. Ebbecke and K. Pierz
phys. stat. sol. (c) 4, 2  (2007) 424-426

Shift currents from symmetry reduction and Coulomb effects in (110)-oriented GaAs/Al0.3Ga0.7As quantum wells
M. Bieler, K. Pierz, U. Siegner and P. Dawson
Physical Review B 76 (2007) 161304

2006

Quantized acoustoelectric single electron transport close to equilibrium
F. J. Ahlers, O. F. O. Kieler, B. E. Sagol, K. Pierz, and U. Siegner
J. Appl. Phys. 100, 093702 (2006)

Enhanced Shot Noise in Tunneling through a Stack of Coupled Quantum Dots
P. Barthold, F. Hohls, N. Maire, K. Pierz, R. J. Haug
Phys. Rev. Lett. 96, 246804 (2006)

Fine structure splitting and biexiton binding energy in single self-assembled InAs/AlAs quantum dots
D. Sarkar, H. P. Van der Meulen, J. M. Calleja, J. M. Becker, R. J. Haug, K. Pierz
Physica E 32 (2006) 111-114

Quantum interference currents by excitation of heavy- and light-hole excitons in GaAs/Al0.3Ga0.7As quantum wells
M. Bieler, K. Pierz, U. Siegner and P. Dawson
Physical Review B 73 (2006) 241312R

Nature and dynamics of carrier escape from InAs/GaAs quantum dots
O. Rubel, P. Dawson, S. D. Baranovskii, K. Pierz, P. Thomas, and E. O. Göbel
phys. stat. sol. c, 3 (2006) 2397

AC longitudinal and contact resistance measurements of quantum Hall devices
J. Schurr, F.-J. Ahlers, G. Hein, K. Pierz, F. Overney, B.M. Wood
Metrologia 43 (2006) 163-173

Shot noise measurements of InAs quantum dots at a Fermi edge singularity
N. Maire, F. Hohls, Lüdtke, R.J. Haug and K. Pierz
Physica E 34 (2006) 508-510

Exciton fine structure and biexciton binding energy in single self-assembled InAs/AlAs quantum dots 
D. Sarkar, H. P. van der Meulen, J. M. Calleja, J. M. Becker, R. J. Haug, and K. Pierz
Journal of Applied Physics 100 (2006) 023109

Quantized acousto-electric single electron transport close to equilibrium
F.J. Ahlers, O.F. Kieler, E.Sagol, K. Pierz, U. Siegner
Journal of Applied Physics 100 (2006) 093702

Entwicklung eines Spannungsimpulsnormals für die Charakterisierung von Höchstfrequenzsystemen =  Development of a voltage pulse standard for the characterization of high-frequency components
M. Bieler, S. Seitz, M. Spitzer, G. Hein, K. Pierz, U. Siegner
Technisches Messen: 73 (2006), 4, 208 – 216

Optical study of single InAs on In0.12Ga0.88As self-assembled quantum dots: biexciton binding energy  dependence on the dots size
C. Dal Savio, K. Pierz, G. Ade, H.-U. Danzebrink, E.O. Göbel, A. Hangleiter
Applied Physics B 84 (2006) 317-322
 
Simultaneous generation of shift and injection currents in (110)-grownGaAs/AlGaAs quantum wells
M. Bieler, K. Pierz, U. Siegner
Journal of Applied Physics 100 (2006) 083710

Correction of picosecond voltage pulses measured with external electro-optic sampling tips
S. Seitz, M. Bieler, G. Hein, K. Pierz, U. Siegner, F.J. Schmückle, W. Heinrich
Measurement Science and Technology 18 (2007) 1353-1360

Characterization of an external electro-optic sampling probe: Influence of probe height on distortion of  measured voltage pulses
S. Seitz, M. Bieler, G. Hein, K. Pierz, U. Siegner, F.J. Schmückle, W. Heinrich
Journal of Applied Physics 100 (2006) 113124

2005

Phonons in InAs/AlAs Single Quantum Dots observed by Optical Emission
D. Sarkar, H.P. van der Meulen, J.M Calleja, J. M. Becker and R. J. Haug, K. Pierz
Physical Review B 71, 081302(R) (2005)

Formation of InAs quantum dots and wetting layers in GaAs and AlAs analyzed by cross-sectional scanning tunnelling microscopy
P. Offermans, P. Koeenrad, H. J. Wolter, K. Pierz, M. Roy, P.A. Maksym
Physica E 26 (2005) 236-240

Nanosecond scale carrier dynamics of self-assembled InAs/AlAs quantum dots studied by time-resolved    photoluminescence
Z. Ma, K. Pierz, J. Hübner and W.W. Rühle
Physica E 28 (2005) 203-208

Spectroscopy and recombination of InAs/AlAs quantum dots
P. Dawson, E.O. Göbel and K. Pierz
Journal of Applied Physics 98 (2005) 13541

Ultrafast electric field measurements in semiconductors by spectral integration over electric field-induced Franz-Keldysh oscillations
M. Bieler, G. Hein, K. Pierz and U. Siegner, M. Koch
Applied Physics Letters 87 (2005) 42102

Formation of InAs wetting layers studied by cross-sectional scanning tunneling microscopy
P. Offermans, P. Koeenrad, R. Nötzel, H. J. Wolter, K. Pierz
Applied Physics Letters: 87 (2005), 111903

Temperature-dependent optical properties of InAs/GaAs quantum dots: Independent carrier versus exciton relaxationSpectroscopy 
P. Dawson, O. Rubel, S. D. Baranovskii, K. Pierz, P. Thomas, and E. O. Göbel
Physical Review B 72 (2005) 235301

Atomic-scale structure and photoluminescence of InAs quantum dots in GaAs and AlAs 
P. Offermans, P. M. Koenraad, and J. H. Wolter, K. Pierz, M. Roy and P. A. Maksym
Physical Review B 72 (2005) 165332

Optoelectronic measurement of the transfer function and time response of a 70 GHz sampling oscilloscope
S. Seitz, M. Bieler, M. Spitzer, K. Pierz, G. Hein and U. Siegner
Measurement, Science and Technology 16 (2005) L7-L9

2004

Quantized charge pumping through a quantum dot by surface acoustic waves.
Ebbecke, J.; Fletcher, N. E.; Janssen, T. J. B. M.; Ahlers, F. J.; Pepper, M.; Beere, H. E.; Ritchie, D. A.
Applied Physics Letters, (2004)

Audio signal transmission over THz communication channel using semiconductor modulator
T. Kleine-Ostmann, K. Pierz, G. Hein, P. Dawson, M. Koch
Electronics Letters 40 (2004) 124-126 

Room-temperatur operation of an electrically driven terahertz modulator
T. Kleine-Ostmann, P. Dawson, K. Pierz, G. Hein, M. Koch
Applied Physics Letter 84 (2004) 3555

Shot noise in tunneling through a single quantum dot
A. Nauen, F. Hohls, N. Maire, K. Pierz, R. Haug
Physical Review B 70 (2004) 033305

2003

Fletcher, N. E.; Ebbecke, J.; Janssen, T. J. B. M.; Ahlers, F. J.; Pepper, M.; Beere, H. E.; Ritchie, D. A.:
Quantized Acoustoelectric Current Transport Through a Static Quantum Dot Using a Surface Acoustic Wave.
Physical Review B, , 68 (2003), 24, 245310-1-245310-9

J. Ebbecke, N. E. Fletcher, F. J. Ahlers, A. Hartland, and T. J. B. M. Janssen, Study of the limitations of the quantized acoustic current technique at PTB and NPL IEEE Trans. Instrum. Meas. 52, 594 (2003).

Gottwaldt, Lars; Pierz, Klaus; Ahlers, Franz-Josef; Schweitzer, Ludwig; Göbel, Ernst Otto:
Dependence of the widths of integer quantum Hall plateau on quantum lifetime.
Journal of Physics : Condensed matter, 15 (2003), 5073 - 5078

Turchinovich, D.; Pierz, Klaus; Jepsen, P. Uhd:
InAs/GaAs quantum dots as efficient free carrier deep traps.
Physica status solidi (c), 0 (2003), 5, 1556 - 1559

Ma, Zhixun; Pierz, Klaus; Keyser, Ulrich-F.; Haug, Rolf J.:
Photoluminescence of self-assembled InAs/AlAs quantum dots as a function of density.
Physica E, 17 (2003), 1-4, 117 - 119

Gottwaldt, Lars; Pierz, Klaus; Ahlers, Franz-Josef; Göbel, Ernst Otto; Nau, S.; Torunski, T.; Stolz, W.:
Correlation of the physical properties and the interface morphology of AlGaAs/GaAs heterostructures
Journal of Applied Physics, 94 (2003), 4, 2464 - 2472

Hapke-Wurst, I.; Zeitler, U.; Keyer, U. F.; Hapke-Wurst, R. J.; Pierz, Klaus; Ma, Zhixun:
Tuning the onset voltage of resonant tunneling through InAs quantum dots by growth parameters.
Applied Physics Letters, 82 (2003), 8, 1209 - 1211

Gottwaldt, Lars; Pierz, Klaus; Ahlers, Franz-Josef; Göbel, Ernst Otto; Nau, S.; Torunski, T.; Stolz, W.:
Mesoscopic island structure at GaAs/(AlGa)As interfaces grown by MBE.
Journal of Crystal Growth, 251 (2003), 85 - 89

Pierz, Klaus; Ma, Zhixun; Keyser, U. F.; Haug, R. J.:
Kinetically limited quantum dot formation on AlAs(100) surfaces.
Journal of Crystal Growth, 249 (2003), 477 - 482

2002

Nauen, A.; Hapke-Wurst, I.; Hohls, F.; Zeitler, U.; Haug, R. J.; Pierz, Klaus:
Shot noise in self-assembled InAs quantum dots.
Physical Review B, 66 (2002), 161303-1 - 161303-4

Zeitler, Ulrich; Hapke-Wurst, Isabella; Sarkar, D.; Haug, R. J.; Frahm, H.; Pierz, Klaus; Jansen, A. G. M.:
High magnetic fields in semiconductor nanostructures: spin effects in single InAs quantum dots.
Advances in Solid State Physics, 42 (2002), 3 - 12

Dawson, Phil; Ma, Zhixun; Pierz, Klaus; Göbel, Ernst Otto:
Microsecond carrier recombination times in InAs/AlAs quantum dots.
Applied Physics Letters, 81 (2002), 13, 2349 - 2351

Ma, Zhixun; Pierz, Klaus:
Carrier thermalization and activation within self-assembled InAs /AlAs quantum dot states.
Surface Science, 511 (2002), 57 - 64

2001

Pierz, Klaus; Miglo, A.; Hinze, Peter; Ahlers, Franz-Josef; Ade, George; Hapke-Wurst, I.; Zeitler, U.; Haug, R.J.:
Photoluminescence Study of InAs/AlAs Quantum Dots.
Physica status solidi B, basic research, 224 (2001), 1, 119 - 122

Hapke-Wurst, I.; Zeitler, U.; Frahm, H.; Jansen, A. G. M.; Haug, R. J.; Pierz, Klaus:
Singularities in magneto-tunneling through InAs quantum dots.
Physica status solidi B, basic research, 224 (2001), 3, 689 - 692

Meyer, J.M.; Hapke-Wurst, I; Zeitler, U. [speaker]; Haug, R.J.; Pierz, Klaus:
Resonant tunneling through InAs quantum dots in tilted magnetic fields: experimental determination of the g-factor anisotropy.
Physica status solidi B, basic research, 224 (2001), 3, 685 – 688

2000

Ahlers, Franz-Josef; Zorin, Alexander:
Einzel-Elektronen-Transport in metallischen und halbleitenden Strukturen.
PTB-Mitteilungen, 110 (2000), 3, 178 - 187

Ebbecke, Jens; Bastian, Georg; Blöcker, Martin; Pierz, Klaus; Ahlers, Franz-Josef:
Enhanced quantized current driven by surface acoustic waves.
Applied Physics Letters, 77 (2000), 16, 2601 - 2603

Hapke-Wurst, I.; Zeitler, U.; Frahm, H.; Jansen, A.G.M.; Haug, R.J.; Pierz, Klaus:
Magnetic-field induced singularities in spin dependent tunneling through InAs quantum dots.
Physical Review B, 62 (2000), 19, 12621 - 12624

1999

Hapke-Wurst, Isabella; Zeitler, Ulrich; Schumacher, H. W.; Haug, R. J.; Pierz, Klaus; Ahlers, Franz-Josef: Size determination of InAs quantum dots using magneto-tunneling experiments. Semiconductor, Science and Technology, 14 (1999), 11, L41 - L43