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2001 Fiscal Year Final Research Report Summary

QUANTUM TRANSPORT IN TWO-DIMENSIONAL ELECTRON SYSTEMS: QUANTUM HALL EFFECT

Research Project

Project/Area Number 11440098
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field 固体物性Ⅰ(光物性・半導体・誘電体)
Research InstitutionGakushuin University

Principal Investigator

KAWAJI Shinji  GAKUSHUIN UNIVERSITY, DEPARTMENT OF PHYSICS PROFESSOR, 理学部, 教授 (00080440)

Co-Investigator(Kenkyū-buntansha) KAWASHIMA Hironori  GAKUSHUIN UNIVERSITY, DEPARTMENT OF PHYSICS RESEARCH ASSOCIATE, 理学部, 助手 (20327315)
Project Period (FY) 1999 – 2001
Keywordsstrong magnetic field / two-dimensional electron system / quantum transport / quantum Hall effect / quantized Hall resistance / high current / collapse of quantized Hall resistance / high Hall electric field
Research Abstract

Following results were obtained in Landau level filling factor dependence of critical currents for collapse of the quantized Hall resistance and breakdown of the quantum Hall effec, and temperature dependence of the critical current for the collapse of the quantized Hall resistance.
1. Filling factor dependence: Magnetic field dependences of critical currents for collapse of the quantized Hall resistance I_<cr>(collapse) and for breakdown of the quantum Hall effect I_<cr>(breakdown) were measured in magnetic field around B = 5.7 T at 0.35 K. The difference I_<cr>(breakdown)-I_<cr>(coilapse) decreases with deviation of the field from the filling factor 4 and the critical behaviors disappear in the filling factor smaller than 3.85 and larger than 4.15.
2. Temperature dependence of the critical collapse current: We observed that temperature dependence of the critical Hall electric field for the collapse of the quantized Hall resistance behaves close to the superconductor-nornmal metal phase transition in the B-T/phase diagrams.

  • Research Products

    (6 results)

All Other

All Publications (6 results)

  • [Publications] H.Iizuka: "Collapse of quantized Hall resistance and breakdown of dissipationless state in the in the in tefer quantum Hall effect"Physica E. 6. 132-135 (2000)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] S.Kawaji: "Collapse of the quantized Hall resistance: Temperature dependence"Proc.25th Int.Conf.on Physics of Semicond., Osaka Ed.by N.Miura and T.Ando, Springer(2001). 969-970 (2001)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] K.Morita: "Current-polarity characteristics in breakdown of the integer quantum Hall effect in GaAB/AlGaAe heterostructures"Physica E. (in press).

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] H. Iizuka, S. Kawaji and T. Okamoto: Physica E. 6. 132-135 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] S. Kawaji, H. Tanaka, H. Iizuka, H. Kawashima and T. Okamoto: Proceedings of the 25th International Conference on Physics of Semicond., Osaka 2000, Edited by N. Miura and T. Ando, Springer. 969-970 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] K. Morita, S. Nomura, H. Tanaka, H. Kawashima and S. Kawaji: Physica E. (in press).

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 2003-09-17  

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