Effect of Disorder on Spin and Charge Excitations in the Fractional Quantum Hall Effect

• Authors: K. Výborný , C. Müller , A. Dethlefsen , R. Haug , A. Wójs
• Languages of publication: EN

Abstracts

EN

A simple model of disorder in fractional quantum Hall systems is combined with the standard exact diagonalisation technique. Electron-density-dependent gaps at filling factors 1/3,2/3,2/5, and 3/5 measured by activated transport can then be fitted with a single reasonable value of d which has the meaning of the separation of ionized donors from the quasi-2D electron gas.

Keywords

EN

73.43.-f; 75.10.Jm; 72.10.Fk; 73.63.-b

Discipline

• 73.63.-b: Electronic transport in nanoscale materials and structures(see also 73.23.-b Electronic transport in mesoscopic systems)
• 73.43.-f: Quantum Hall effects
• 72.10.Fk: Scattering by point defects, dislocations, surfaces, and other imperfections (including Kondo effect)
• 75.10.Jm: Quantized spin models, including quantum spin frustration

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2007
• Volume: 112
• Issue: 2
• Pages: 249-254

Dates

published

2007-08

received

2007-06-09

Contributors

author

K. Výborný

• Fyzikálníústav Akademie vědČeské rep., Cukrovarnická 10, 16253 Praha 6, Czech Republic

author

C. Müller

• I. Inst. für theor. Physik, Universität Hamburg, Jungiusstr. 9, 20355 Hamburg, Germany

author

A. Dethlefsen

• Inst. für Festkörperphysik, Universität Hannover, Appelstr. 2, 30167 Hannover, Germany
• Centre for Atom Optics and Ultrafast Spectroscopy, Swinburne University of Technology, Hawthorn, Victoria 3122, Australia

author

R. Haug

• Inst. für Festkörperphysik, Universität Hannover, Appelstr. 2, 30167 Hannover, Germany

author

A. Wójs

• Instytut Fizyki, Politechnika Wrocławska, Wybrzeże Wyspiańskiego 27, 50-370 Wrocław, Poland

References

• 1. A.F. Dethlefsen, R.J. Haug, K. Výborný, O. Certik, A. Wójs, Phys. Rev. B, 74, 195324, 2006
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• 6. K. Výborný, Ch. Muller, D. Pfannkuche, cond-mat/0703109; K. Výborný, Ann. Phys. (Leipzig), 16, 87, 2007
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• 8. Xin Wan, D.N. Sheng, E.H. Rezayi, Kun Yang, R.N. Bhatt, F.D.M. Haldane, Phys. Rev. B, 72, 075325, 2005; D.N. Sheng, Xin Wan, E.H. Rezayi, Kun Yang, R.N. Bhatt, F.D.M. Haldane, Phys. Rev. Lett., 90, 256802, 2003
• 9. K. Výborný, O. Certik, D. Pfannkuche, D. Wodziński, A. Wójs, J.J. Quinn, Phys. Rev. B, 75, 045434, 2007

Identifiers

DOI

10.12693/APhysPolA.112.249