Quantum Resistance
- M. Götz, K. M. Fijalkowski, E. Pesel, M. Hartl, S. Schreyeck, M. Winnerlein, S. Grauer, H. Scherer, K. Brunner, C. Gould, F. J. Ahlers, L. W. Molenkamp, "Precision measurement of the quantized anomalous Hall resistance at zero magnetic field", Appl. Phys. Lett. 112, 072102 (2018)
Small Currents
- C. Krause, D. Drung, M. Götz, H. Scherer: “Noise-optimized ultrastable low-noise current amplifier”, Review of Scientific Instruments 90, 014706 (2019)
- H. Scherer, H. W. Schumacher: “Single-electron pumps and quantum current metrology in the revised SI”, Annalen der Physik 531, 1800371 (2019)
- H. Scherer, D. Drung, C. Krause, M. Götz, U. Becker: “Electrometer calibration with sub-part-per-million uncertainty”, IEEE Trans. Instrum. Meas. 68 (Special issue CPEM 2018), 1887 (2019)
- M. Götz, D. Drung, C. Krause, U. Becker, H. Scherer: “Calibrating ultrastable low-noise current amplifiers of the 2nd generation with a cryogenic current comparator”, IEEE Trans. Instrum. Meas. 68 (Special issue CPEM 2018), 2027 (2019)
- C. Krause, D. Drung, H. Scherer: "Measurement of sub-picoampere direct currents with uncertainties below ten attoamperes"
Rev. Sci. Instrum. 88, 024711 (2017).
- F. Stein, H. Scherer, T. Gerster, R. Behr, M. Götz, E. Pesel, C. Leicht, N. Ubbelohde, T. Weimann, K. Pierz, H. W. Schumacher, F. Hohls, "Robustness of single-electron pumps at sub-ppm current accuracy level",
Metrologia 54, S1–S8 (2017), open acccess.
- H. Scherer, D. Drung, "Quantenbasierte Messung und Erzeugung kleiner Stromstärken",
PTB Mitteilungen 126 (3), 59–69 (2016).
- D. Drung, C. Krause, "Ultrastable low-noise current amplifiers with extended range and improved accuracy",
IEEE Trans. Instrum. Meas. (2016), published online.
- H. Scherer, U. Siegner, "Elektronen zählen, um Strom zu messen",
PTB-Mitteilungen 126 (2), 53–61 (2016).
- C. Krause, D. Drung, H. Scherer, "Measurement of sub-picoampere direct currents with uncertainties below ten attoamperes",
Rev. Sci. Instrum. 88, 024711 (2017), open access.
- H. Scherer, "Single-electron transport and the new standard for electrical current",
Online publication in IEEE/CSC & ESAS SUPERCONDUCTIVITY NEWS FORUM (2016).
- D. Drung, M. Götz, E. Pesel, H. Scherer, "Improving the traceable measurement and generation of small direct currents",
IEEE Trans. Instrum. Meas. 64, 3021 – 3030 (2015), open-access.
- D. Drung, C. Krause, U. Becker, H. Scherer, F. J. Ahlers,
"Ultrastable low-noise current amplifier: a novel device for measuring small electric currents with high accuracy",
Rev. Sci. Instrum. 86, 024703 (2015).
- D. Drung, C. Krause, S. P. Giblin, S. Djordjevic, F. Piquemal, O. Séron, F. Rengnez, M. Götz, E. Pesel, H. Scherer,
"Validation of the ultrastable low-noise current amplifier as travelling standard for small direct currents”,
Metrologia 52, 756 – 763 (2015).
- F. Stein, D. Drung, L. Fricke, H. Scherer, F. Hohls, C. Leicht, M. Götz, Ch. Krause, R. Behr, E. Pesel, K. Pierz, U. Siegner, F. J. Ahlers, H. W. Schumacher, "Validation of a quantized-current source with 0.2 ppm uncertainty",
Appl. Phys. Lett. 107, 103501 (2015).
- G.-D. Willenberg, "EUROMET.EM-S24: Supplementary comparison of small current sources; [EUROMET project 830, report]",
Tech. Suppl. in Metrologia 50, 01002 (2013).
- B. Kästner, Ch. Leicht, F. Hohls, M. Götz, D. Drung, K. Pierz, F. J. Ahlers, H. W. Schumacher,
"Characterization of a GHz non-adiabatic single-electron pump using a cryogenic current comparator",
2012 Conference on Precision Electromagnetic Measurements digest, 706-707 (2012).
- S. P. Giblin, G.-D. Willenberg, N. E. Fletcher,
"Frequency dependence of gas-dielectric capacitors used in sub-nA reference current generators",
2010 Conference on Precision Electromagnetic Measurements digest, 318-319 (2010).
- G.-D. Willenberg, H. N. Tauscher,
"Novel Digital Voltage Ramp Generator for Use in Precision Current Sources in the Picoampere Range",
IEEE Trans. Instrum. Meas. 58, 756-760 (2009).
- G.-D. Willenberg, H. N. Tauscher, P. Warnecke, "A traceable precision current source for currents between 100 aA and 10 pA",
IEEE Trans. Instrum. Meas. 52, 436-439 (2003).
Cryogenic Current Comparators
- M. E. Bierzychudek, M. Götz, M. Schmelzer, "Operation of a cryogenic current comparator in presence of mechanical vibrations",
2016 Conference on Precision Electromagnetic Measurements, 1–2 (2016).
- M. Götz, D. Drung, "Performance of the binary compensation unit for cryogenic current comparators",
2016 Conference on Precision Electromagnetic Measurements, 1–2 (2016).
- M. Bierzychudek, R. Sánchez-Peña, A. Tonina, R. Iuzzolino, D. Drung, M. Götz,
"Application of robust control to a cryogenic current comparator",
2016 Conference on Precision Electromagnetic Measurements, 1–2 (2016).
- D. Drung, M. Götz, E. Pesel, H. Scherer, "Improving the traceable measurement and generation of small direct currents",
IEEE Trans. Instrum. Meas. 64, 3021 – 3030 (2015), open-access.
- M. Götz, E. Pesel, D. Drung, "A compact 14-bit cryogenic current comparator",
2014 Conference on Precision Electromagnetic Measurements digest, 684 – 685 (2014).
- D. Drung, M. Götz, E. Pesel, H.-J. Barthelmess, C. Hinnrichs,
"Aspects of application and calibration of a binary compensation unit for cryogenic current comparator setups",
IEEE Trans. Instrum. Meas. 62, 2820-2827 (2013).
- D. Drung, M. Götz, E. Pesel, H.-J. Barthelmess, C. Hinnrichs, "Binary compensation unit for cryogenic current comparators",
2012 Conference on Precision Electromagnetic Measurements digest, 374-375 (2012).
- B. Kästner, Ch. Leicht, F. Hohls, M. Götz, D. Drung, K. Pierz, F. J. Ahlers, H. W. Schumacher,
"Characterization of a GHz non-adiabatic single-electron pump using a cryogenic current comparator",
2012 Conference on Precision Electromagnetic Measurements digest, 706-707 (2012).
- M. Götz, D. Drung, E. Pesel, F. J. Ahlers,
"Settling behavior of the bridge voltage in resistance ratio measurements with cryogenic current comparators",
IEEE Trans. Instrum. Meas. 60, 2660-2666 (2011).
- M. Götz, D. Drung, E. Pesel,
"Settling behavior of the bridge voltage in resistance ratio measurements with cryogenic current comparators",
2010 Conference on Precision Electromagnetic Measurements digest, 573-574 (2010).
- D. Drung, M. Götz, E. Pesel, J.-H. Storm, C. Aßmann, M. Peters, Th. Schurig,
"Improving the stability of cryogenic current comparator setups",
Supercond. Sci. Technol. 22, 114004 (2009).
- M. Götz, D. Drung, E. Pesel, H.-J. Barthelmess, C. Hinnrichs, C. Aßmann, M. Peters, H. Scherer, B. Schumacher, Th. Schurig, "Improved Cryogenic Current Comparator Setup With Digital Current Sources",
IEEE Trans. Instrum. Meas. 58, 1176-1182 (2009).
Quantum Metrological Triangle & Electron Counting Capacitance Standard
- H. Scherer, J. Schurr F. J. Ahlers, "Electron counting capacitance standard and quantum metrology triangle experiments at PTB",
accepted for publication in Metrologia (2017) - H. Scherer, B. Camarota, "A review on quantum metrology triangle experiments",
Superconductivity News Forum (SNF). Global ed. (2013), 25 [Online only].
- B. Camarota, H. Scherer, M. W. Keller, S. V. Lotkhov, G.-D. Willenberg, F. J. Ahlers,
"Electron counting capacitance standard with an improved five-junction R-pump",
Metrologia 49, 8-14 (2012).
- H. Scherer, B. Camarota, "Quantum metrology triangle experiments: a status review",
Electrical quantum standards and their role in the SI ; Meas. Sci. Technol. 23, 124010 (2012).
- H. Scherer, S. V. Lotkhov, G.-D. Willenberg, B. Camarota, "Progress towards the electron counting capacitance standard at PTB",
IEEE Trans. Instrum. Meas. 58, 997-1002 (2009).