Physikalisch-Technische Bundesanstalt

Pal, G.; Apel, W.; Schweitzer, L.:
Landau level splitting due to graphene superlattices
Physical Review B 85 (2012), pp. 235457-1 – 235457-11

Schweitzer, L. ; Markoš, P.:
Scaling at chiral quantum critical points in two dimensions.
Physical Review B 85 (2012), pp. 195424-1 – 195424-7

Markoš, P.; Schweitzer, L.:
Disordered two-dimensional electron systems with chiral symmetry
Physica B 407 (2012), pp. 4016 – 4022

Pal, G.; Apel, W.; Schweitzer, L.:
Electric transport through circular graphene quantum dots: Presence of disorder
Physical Review B 84 (2011), pp. 075446-1 – 075446-8

Apel, W.; Pal, G.; Schweitzer, L.:
Energy gap in graphene nanoribbons with structured external electric potentials.
Physical Review B 83 (2011), pp. 125431-1 – 125431-6

Markoš, P. ; Schweitzer, L.:  
Role of the symmetry parameter β in the strongly localized regime.
Physical Review B 82 (2010), pp. 113412-1 – 113412-4

Markoš, P. ; Schweitzer, L.:
Logarithmic scaling of Lyapunov exponents in disordered chiral two-dimensional lattices.
Physical Review B 81 (2010), pp. 205432-1 – 205432-5
 
Schweitzer, L.:
Narrow depression in the density of states at the Dirac point in disordered graphene.
Physical Review B 80 (2009), pp. 245430-1 – 245430-6
 
Schweitzer, L. ; Markoš, P.:
Disorder-driven splitting of the conductance peak at the Dirac point in graphene.
Physical Review B 78 (2008), pp. 205419-1 – 205419-8
 
Schweitzer, L. ; Markoš, P.:
Critical conductance of the chiral two-dimensional random flux model.
Physica E 40 (2008), pp. 1335 - 1337
 
Schweitzer, L.:
Anomalous integer quantum Hall effect near 1/2 flux quanta per plaquette.
International Journal of Modern Physics B 21 (2007), pp. 5231 - 5235
 
Markoš, P. ; Schweitzer, L.:
Critical conductance of two-dimensional chiral systems with random magnetic flux.
Physical Review B 76 (2007), pp. 115318-1 - 115318-7
 
Markoš, P. ; Schweitzer, L.:
Critical regime of two-dimensional Ando model: relation between critical conductance and fractal dimension of elecronic eigenstates.
Journal of Physics A: Mathematical and General 39 (2006), pp. 3221 - 3230
 
Schweitzer, L. ; Markoš, P.:
Universal conductance and conductivity at critical points in integer quantum Hall systems.
Physical Review Letters 95 (2005), pp. 256805-1 - 256805-4
 
Koschny, Th. ; Schweitzer, L.:
Levitation of the quantum Hall extended states in the B --> 0 limit.
Physical Review B 70 (2004), pp. 165301-1 - 165301-7
 
Markoš, P. ; Schweitzer, L. ; Weyrauch, M.:
Comment on 'Exact analytical solution for the generalized Lyapunov exponent of the two-dimensional Anderson localization'.
Journal of Physics: Condensed Matter 16 (2004), pp. 1679 - 1681
 
Bachmair, H. ; Göbel, E. O. ; Hein, G. ; Melcher, J. ; Schumacher, B. ; Schurr, J. ; Schweitzer, L. ; Warnecke, P.:
The von Klitzing resistance standard.
Physica E 20 (2003) pp. 14 - 23
 
Schweitzer, L.:
Frequency dependent electrical transport in the integer quantum Hall effect.
In: Brandes, T. ; Kettemann, S. (editors): Anderson Localization and Its Ramifications - Disorder, Phase Coherence, and Electron Correlations. (Lecture Notes in Physics, Band 630.) Springer 2003, pp. 65 - 82
 
Gottwaldt, L. ; Pierz, K. ; Ahlers, F. J. ; Schweitzer, L. ; Göbel, E. O.:
Dependence of widths of the integer quantum Hall plateau on quantum lifetime.
Journal of Physics: Condensed Matter 15 (2003) pp. 5073 - 5078
 
Koschny, Th. ; Schweitzer, L.:
Floating of critical states in quantum Hall systems with long-range correlated disorder.
In: Long, A. R. ; Davies, J. H. (editors): Proceedings of the 15th International Conference on High Magnetic fields in Semiconductor Physics. Institute of Physics Conference Series 171 (2003), pp. A20:1 - 8
 
Koschny, Th. ; Schweitzer, L.:
Levitation of quantum Hall critical states in a lattice model with spatially correlated disorder.
Physical Review B 67 (2003), pp. 195307-1 - 195307-10
 
Koschny, Th. ; Schweitzer, L.:
Influence of correlated disorder potentials on the levitation of current carrying states in the quantum Hall effect.
Physica E: Low-dimensional Systems and Nanostructures 12 (no. 1-4) (2002), pp. 654-657
 
Potempa, H. ; Schweitzer, L.:
Metal-insulator transition in two-dimensional disordered systems with power-law transfer terms.
Physical Review B 65 (2002), 201105(R)
 
Bäker, A. ; Schweitzer, L.:
Frequency dependent transport in the integer quantum Hall effect.
In: Proc. 25th Int. Conf. Phys. Semicond., Osaka 2000, (Eds. N. Miura and T. Ando), Springer Proceedings in Physics 78 (2001), pp. 975-976
 
Koschny, Th. ; Potempa, H. ; Schweitzer, L.:
Levitation of Current Carrying States in the Lattice Model for the Integer Quantum Hall Effect.
Physical Review Letters 86 (2001), pp. 3863-3866
 
Potempa, H. ; Schweitzer, L.:
Floating of critical states and the QH to insulator transition.
Physica B 298 (2001), pp. 52-55
 
Bäker, A. ; Schweitzer, L.:
Frequency dependent conductivity in the integer quantum Hall effect.
Annalen der Physik (Leipzig) 8 (1999), SI-21 - SI-24
 
Potempa, H. ; Schweitzer, L.:
Localisation of electrons in two-dimensional spatially-correlated random magnetic fields.
Annalen der Physik (Leipzig) 8 (1999), SI-209 - SI-212
 
Schweitzer, L. ; Potempa, H.:
Influence of boundary conditions on level statistics and eigenstates at the metal-insulator transition.
Physica A 266 (1999), pp. 486-491
 
Kantelhardt, J. W. ; Bunde, A. ; Schweitzer, L.:
Level statistics for vibrational eigenstates of percolation clusters.
Physica A 266 (1999), pp. 76-80
 
Potempa, H. ; Bäker, A.; Schweitzer, L.:
Quantum-Hall to insulator transition.
Physica B 256-258 (1998), pp. 591-594
 
Bunde, A. ; Kantelhardt, J. ; Schweitzer, L.:
Localization behavior of vibrational modes.
Annalen der Physik (Leipzig) 7 (1998), 372-382
 
Potempa, H. ; Schweitzer, L.:
Critical level statistics of quantum Hall systems with Dirichlet boundary conditions.
Annalen der Physik (Leipzig) 7 (1998), 457-461
 
Kantelhardt, J. ; Bunde, A. ; Schweitzer, L.:
Extended fractons and localized phonons on percolation clusters.
Physical Review Letters 81 (1998), p. 4907
 
Potempa, H. ; Schweitzer, L.:
Dependence of critical level statistics on the sample shape.
Journal of Physics: Condensed Matter 10 (1998), pp. L431-L435
 
Batsch, M. ; Schweitzer, L. ; Kramer, B.:
Energy-level statistics and localization of 2d electrons in random magnetic fields.
Physica B 249-251 (1998), pp. 792-795
 
Schweitzer, L. ; Zharekeshev, I. Kh.:
Scaling of level statistics and critical exponent of disordered two-dimensional symplectic systems.
Journal Physics: Condensed Matter 9 (1997), pp. L441-L445
 
Batsch, M. ; Schweitzer, L.:
Level Statistics in the quantum Hall regime.
In: Landwehr, G. (ed.) ; Ossau, W. (ed.): High Magnetic Fields in the Physics of Semiconductors II: Proc. Int. Conf. (Würzburg 1996), World Scientific Publishers Co., Singapore, 1997, p. 47
 
Batsch, M. ; Schweitzer, L. ; Zharekeshev, I. Kh. ; Kramer, B.:
Crossover from critical orthogonal to critical unitary statistics at the Anderson transition.
Physical Review Letters 77 (1996), pp. 1552-1555
 
Brandes, T. ; Huckestein, B. ; Schweitzer, L.:
Critical dynamics and multifractal exponents at the Anderson transition in 3d disordered systems.
Annalen der Physik (Leipzig) 5 (1996), 633-651
 
Brandes, T. ; Schweitzer, L. ; Kramer, B.:
Temperature-dependent broadening of rho_xx-peaks and inelastic scattering in the integer quantum Hall effect.
Physica B 216 (1996), pp. 369-371
 
Scherer, H. ; Schweitzer, L. ; Ahlers, F. ; Bliek, L. ; Lösch, R. ; Schlapp, W.:
Current Scaling and Electron Heating between Integer Quantum Hall plateaus in Ga/AlxGa1-xAs.
Semicond. Sci. Technol. 10 (1995), pp. 959-964
 
Schweitzer, L. ; Zharekeshev, I. Kh.:
Critical level spacing distribution of two-dimensional disordered systems with spin-orbit coupling.
Journal of Physics: Condensed Matter 7 (1995), pp. L377-L381
 
Schweitzer, L.:
Multifractal properties of critical eigenstates in two-dimensional systems with symplectic symmetry.
Journal of Physics: Condensed Matter 7 (1995), pp. L281-L285
 
Brandes, T. ; Schweitzer, L. ; Kramer, B.:
Scaling and Inelastic Scattering in the IQHE.
In: Proceedings of the 22th International Conference on the Physics of Semiconductors, Vancouver 1994, World Scientific Publishing Co., Singapore, 1995, p. 987-990
 
Brandes, T. ; Schweitzer, L. ; Kramer, B.:
Inelastic Scattering and Temperature-Dependent Broadening of rho_xx-Peaks in the IQHE.
In: Heiman, Don (ed.): High Magnetic Fields in the Physics of Semiconductors. Singapore: World Scientific Publishing Co. 1995, pp. 284-287
 
Brandes, T. ; Schweitzer, L. ; Kramer, B.:
Scaling and Inelastic Scattering in the Integer Quantum-Hall-Effect.
In: Cerdeira, H. (ed.) ; Kramer, B. (ed.) ; Schön, G. (ed.): Quantum Dynamics of Submicron Structures Bd. 291. Dordrecht: Kluwer Academic Publishers, 1995, pp. 115-127
 
Kramer, B. ; Schweitzer, L. ; Wöger, W. ; Apel, W.:
Quanteneffekte in mesoskopischen Systemen.
PTB-Mitteilungen 104 (1994), 308-311
 
Brandes, T. ; Schweitzer, L. ; Kramer, B.:
Multifractal Wavefunctions and Inelastic Scattering in the Integer Quantum Hall Effect.
Physical Review Letters 72 (1994), pp. 3582-3585
 
Huckestein, B. ; Schweitzer, L.:
Relation between the Correlation Dimensions of Multifractal Wavefunctions and Spectral Measures in Integer Quantum Hall Systems.
Physical Review Letters 72 (1994), pp. 713-716
 
Huckestein, B. ; Schweitzer, L.:
Multifractality and anomalous diffusion at the mobility edge in disordered systems.
J. Non-Cryst. Solids 164-166 (1993), pp. 461-464
 
Huckestein, B. ; Schweitzer, L.:
Multifractal behaviour and scaling in disordered mesoscopic QHE-systems.
Physica A 191 (1992), pp. 406-409
 
Huckestein, B. ; Schweitzer, L.:
Multifractality and scaling in disordered 2-d Landau levels.
Helvetica Physica Acta 65(2/3) (1992), pp. 317-318
 
Hein, G. ; Schneider, P. ; Schweitzer, L. ; Ahlers, F.J. ; Bliek, L. ; Nickel, H. ; Lösch, R. ; Schlapp, W.:
Influence of a constriction on the longitudinal resistance of a 2DEG: effects of electrical fields and edge states.
Surf. Sciences 263 (1992), pp. 293-297
 
Huckestein, B. ; Kramer, B. ; Schweitzer, L.:
Characterization of the electronic states near the centres of the Landau bands under quantum Hall conditions.
Surf. Sciences 263 (1992), pp. 125-128
 
Huckestein, B. ; Schweitzer, L.:
Multifractal eigenstates in the centre of the disorder broadened Landau band.
In Landwehr, G. (editor): High Magnetic Fields in Semiconductor Physics III: Proceedings of the International Conference, Würzburg 1990, Springer Series in Solid-State Sciences 101, Springer, Berlin (1992), pp. 84-88
 
Johnston, R. ; Schweitzer, L.:
The structure of the most extended states of the two-dimensional non-interacting electron gas in a normal magnetic field.
J. Phys.: Condens. Matter 2 (1990), pp. 4137-4141
 
Huckestein, B. ; Johnston, R. ; Schweitzer, L.:
Influence of magnetic fields on ballistic transport in narrow constrictions.
In Landwehr, G. (editor): High Magnetic Fields in Semiconductor Physics II: Proceedings of the International Conference, Würzburg 1988, Springer Series in Solid-State Sciences 87, Springer, Berlin (1989), pp. 371-374
 
Johnston, R. ; Schweitzer, L.:
The quenching of the quantized Hall resistance at low magnetic fields.
J. Phys.: Condens. Matter 1 (1989), pp. 4465-4468
 
Johnston, R. ; Schweitzer, L.:
Theory of quantized resistance in narrow constrictions.
J. Phys. C 21 (1988), pp. L861-L866
 
Johnston, R. ; Schweitzer, L.:
An alternative model for the integral quantum-Hall-effect.
Z. Phys. B 72 (1988), pp. 217-224
 
Gudmundsson, V. ; Gerhardts, R.R. ; Johnston, R. ; Schweitzer, L.:
Magnetic field effects in a confined two-dimensional electron gas: A comparison between continuum and lattice model.
Z. Phys. B 70 (1988), pp. 453-460
 
Johnston, R. ; Schweitzer, L.:
On the relationship of drift-currents and potential changes to the quantum Hall effect.
Z. Phys. B 70 (1988), pp. 25-29
 
Johnston, R. ; Kramer, B. ; Masek, J. ; Schweitzer, L.:
The localisation length and the density of states in correlated random systems.
J. Non-Cryst. Solids 97/98 (1987), pp. 241-244
 
Johnston, R. ; Schweitzer, L.:
Steplike currents in confined two-dimensional systems.
Z. Phys. B 69 (1987), pp. 77-80
 
Johnston, R. ; Schweitzer, L.:
The density of states of a two-dimensional electron gas in a perpendicular magnetic field under the influence of a correlated random potential.
In Landwehr, G. (editor): High Magnetic Fields in Semiconductor Physics: Proceedings of the International Conference, Würzburg 1986, Springer Series in Solid-State Sciences 71, Springer, Berlin (1987), pp. 71-74
 
Johnston, R. ; Schweitzer, L.:
The quantum mechanical Hall effect.
In Landwehr, G. (editor): High Magnetic Fields in Semiconductor Physics: Proceedings of the International Conference, Würzburg 1986, Springer Series in Solid-State Sciences 71, Springer, Berlin (1987), pp. 53-56
 
Johnston, R. ; Wöger, W.; Schweitzer, L.:
The quantummechanical Hall-current on a cylinder.
Metrologia 22 (1986), pp. 152-154
 
Johnston, R. ; Kramer, B.; MacKinnon, A. ; Schweitzer, L.:
Magnetotransport and electron states in two-dimensional systems including the effect of a random potential and boundary conditions.
Surf. Science 170 (1986), pp. 256-261
 
Bulka, B. ; Kramer, B. ; Schweitzer, L.:
Electron localization near the mobility edge in the Anderson model.
J. Non-Cryst. Solids 77/78 (1985), pp. 379-384
 
Schweitzer, L.; Kramer, B. ; MacKinnon, A.:
The conductivity of a two-dimensional electronic system of finite width in the presence of a strong perpendicular magnetic field and a random potential.
Z. Phys. B 59 (1985), pp. 379-384
 
Dersch, H. ; Schweitzer, L.:
Spin-dependent hole diffusion in a-Si:H.
Phil. Mag. B 50 (1984), pp. 397-404
 
Kramer, B. ; Schweitzer, L. ; MacKinnon, A.:
Density of states of a two-dimensional electron in a strong magnetic field and a random potential.
Z. Phys. B 56 (1984), pp. 297-300
 
Schweitzer, L.; Kramer, B. ; MacKinnon, A.:
Magnetic field and electron states in two-dimensional disordered systems.
J. Phys. C 17 (1984), pp. 4111-4125
 
Schweitzer, L. ; Scheffler, M.:
Electronic properties of strained bonds in amorphous silicon: The origin of the band-tail states?
In Taylor, P.C. ; Bishop, S.G. (editors): Optical effects in amorphous semiconductors, AIP Conference Proceedings 120, Snowbird/Utah (1984), pp. 379-385
 
MacKinnon, A. ; Schweitzer, L. ; Kramer, B.:
Magneto-transport in 2d: Some numerical results.
Surf. Science 142 (1984), pp. 189-195
 
Dersch, H. ; Schweitzer, L.:
Recombination in low defect density a-Si:H.
J. Non-Cryst. Solids 59/60 (1983), pp. 337-340
 
Grünewald, M. ; Pohlmann, B. ; Schweitzer, L. ; Würtz, D.:
Mean field approach to the electron glass: The coulomb gap.
J. Non-Cryst. Solids 59/60 (1983), pp. 77-80
 
Dersch, H. ; Schweitzer, L. ; Stuke, J.:
Recombination processes in a-Si:H; spin dependent photoconductivity.
Phys. Rev. B 28 (1983), pp. 4678-4684
 
Grünewald, M. ; Pohlmann, B. ; Schweitzer, L. ; Würtz, D.:
Mean field approach to the electron glass.
J. Phys. C 15 (1982), pp. L1153-L1158