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Investigation of Quantum Conductance Fluctuation in Mesoscopic Structure of Degenerate Semiconductor

Research Project

Project/Area Number 63460031
Research Category

Grant-in-Aid for General Scientific Research (B)

Allocation TypeSingle-year Grants
Research Field 固体物性
Research InstitutionOsaka University

Principal Investigator

MURASE Kazuo  Fac. of Science, Osaka Univ. Professor, 理学部, 教授 (50028164)

Co-Investigator(Kenkyū-buntansha) ISHIDA Shuichi  Science. Univ. of Tokyo, Yamaguchi Col. Professor, 山口短期大学, 教授 (70127182)
GAMO Kenji  Fac. of Engi. Science, Osaka Univ. Professor, 基礎工学部, 教授 (70029445)
TAKAOKA Sadao  Fac. of Science, Osaka Univ. Asso. Prof., 理学部, 助教授 (50135654)
Project Period (FY) 1988 – 1989
Project Status Completed (Fiscal Year 1989)
Budget Amount *help
¥6,800,000 (Direct Cost: ¥6,800,000)
Fiscal Year 1989: ¥2,200,000 (Direct Cost: ¥2,200,000)
Fiscal Year 1988: ¥4,600,000 (Direct Cost: ¥4,600,000)
KeywordsMesoscopic / Quantum Wire / Ballistic Transport / Superconductivity / Anderson Localization / Shubnikov-de Haas Effect / Aharonov-Bohm Effect / GaAs-AlGaAs Heterostructure / 極微細線 / 非局所的伝導率 / ジュブニコフ・ド・ハ-ス効果 / アハラノフーボーム効果 / アンダーソン局在 / プラチナ・シリサイド / GaAs / GaAlAsヘテロ構造
Research Abstract

We have made He^3 cryostat (0.4K) with a compact superconducting malenet (8.5T) and investigated the quantum transport of mesoscopic system under low temperatures and high magnetic fields. The following results are obtained.
(1) The magnetic depopulation effect of 1-D subbands is observed in the ultrafine narrow wire (the effective width is 170nm) of GaAs/AlGaAs heterostructures.
(2) The unsymmetrical conductance fluctuations under a magnetic field inversion due to the non-local conductivity effect is observed in the small cross wire of GaAs/AlGaAs heterostructure.
(3) In the ballistic transport region of quantum wire, where the sample size and the elastic scattering length are comparable, we observed the necative bend resistance, the non-local voltage fluctuations and the overshootine, effect of magnetoresistance near zero field.
(4) In the multi-terminal quantum wire, we observed the Shubnikov-de Haas (SdH.) effect in the non-local geometry, where the current probes and voltace probes are separated. The decay lengths of amplitudes in the S.dH. oscillation and the negative bend resistance with respect to the separation distance are measured. The decay length of the negative bend resistance is approximately same to the elastic scattering length of electron, however, that of SdH. oscillation is much longer than the scattering length and it becomes shorter with higher magnetic fields.
(5) The Anderson localization of Sb film is observed.
(6) The magneto-resistance flutuation is investigated in the ultra-fine narrow wire of Bi. When the length of wire(L) is shorter than the coherence length electron the conductance fluctuations are not universal and will diverse as L^<-2>.

Report

(3 results)
  • 1989 Annual Research Report   Final Research Report Summary
  • 1988 Annual Research Report
  • Research Products

    (31 results)

All Other

All Publications (31 results)

  • [Publications] K.Ishibashi,Y.Takagaki,K.Gamo S.Namba,S.Takaoka,K.Murase,S.Ishida,and Y.Aoyagi: ""Fabrication and Transport Characterisrics of Semiconductor wire and Ring Structures"" Journal of Vacuum Science and Technology B. 6. 1852-1855 (1988)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1989 Final Research Report Summary
  • [Publications] Y.Liu,S.Takaoka and K.Murase: ""Anti-localizatiom Effect in Epitaxially Grown Thin Sb Films on BaF_2"" Solid State Communications. 67. 738-786 (1988)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1989 Final Research Report Summary
  • [Publications] Y.Takagaki,K.Gamo S.Namba,S.Ishida,S.Takaoka,K.Mruase,K.Ishibashi,and Y.Aoyagi: ""Nonlocal Quantum Transport in Narrow Multibranched Electron Wave Guide of GaAs-AlGaAs"" Solid State Communications. 68. 1051-1054 (1988)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1989 Final Research Report Summary
  • [Publications] Y.Takagaki,K.Gamo S.Namba,S.Takaoka,K.Murase,S.Ishida,K.Ishibashi,and Y.Aoyagi: ""Nonlocal Voltage Fluctuations in a Quasi Ballistic Electron Waveguide"" Solid State Communications. 69. 811-815 (1989)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1989 Final Research Report Summary
  • [Publications] Y.Takagaki,K.Ishibashi,K.Gamo,S.Namba,S.ishida,S.Takaoka,and K.Murase: ""Dimensional Crossover of Electron-Electron Scattering in GaAs-AlGaAs Wires"" Japanese Journal of Applied Physics. 28. 645-648 (1989)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1989 Final Research Report Summary
  • [Publications] Y.Takagaki,F.Wakaya,Y.Kusumi,S.Takaoka,Y.Yuba,K.Gamo,K.Murase,and S.Namba: ""Fabrication of Narrow Channels in GaAs-AlGaAs Heterostructures and the Lateral Quantization Effect"" MicroElectronic Engineering. 9. 353-356 (1989)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1989 Final Research Report Summary
  • [Publications] Y.Takagaki,K.Gamo,S.Namba,S.Takaoka,K.Murase,and S.Ishida: ""Overshoot of Magnetoresistance at GaAs-AlGaAs Narrow Wire Junctions"" Solid Sate Communications. 71. 809-812 (1989)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1989 Final Research Report Summary
  • [Publications] Y.Takagaki,F.Wakaya,S.Takaoka,K.Gamo,K.Murase,and S.Namba: ""Fabrication of Ballistic Quantum Wires and the Transport Properties"" Japanese Journal of Applied Physics. 28. 390-394 (1989)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1989 Final Research Report Summary
  • [Publications] Y.Takagaki,K.Gamo,S.Namba,S.Ishida,S.Takaoka,and K.Murase: ""Width Dependence of Magnetoresistance in GaAs-AlGaAs WiresFabricated by Mesa Etching"" Journal ofApplied Physics. 67. 340-343 (1990)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1989 Final Research Report Summary
  • [Publications] Y.Liu,R.S.Zheng,S.Takaoka,K.Murase,K.Gamo,and S.Namba: ""Voltage Fluctuation inMesoscopic Structures of Bismuth"" SolidState Communications. 73. 667-670 (1990)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1989 Final Research Report Summary
  • [Publications] K.Ishibashi, Y.Takagaki, K.Gamo, S.Namba, S.Takaoka, K.Murase, S.Ishida, and Y.Aoyagi: "Fabrication and Transport Characteristics of Semiconductor Wire and Ring Structures" Journal of Vacuum Science and Technology B: Vol.6, No.6, pp.1852-1855, 1988.

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1989 Final Research Report Summary
  • [Publications] Y.Liu, S.Takaoka and K.Murase: "Anti-localization Effect in Epitaxially Grown Thin Sb Films on BaF_2" Solid State Communications: Vol.67, No.8, pp.783-786.1988.

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1989 Final Research Report Summary
  • [Publications] Y.Takagaki, K.Gamo, S.Namba, S.Ishida, S.Takaoka, K.Murase, K.Ishibashi and Y.Aoyagi: "Nonlocal Quantum Transport in Narrow Multibranched Electron Wave Guide of GaAs-AlGaAs" Solid State Communications: Vol.68, No.12, pp.1051-1054, 1988.

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1989 Final Research Report Summary
  • [Publications] Y.Takagaki, K.Gamo, S.Namba, S.Takaoka, K.Murase, S.Ishida, K.Ishibashi, and Y.Aoyogai: "Nonlocal Voltage Fluctuations in a Quasi Ballistic Electron Waveguide" Solid State Communications: Vol.69, No.8, pp.811-815, 1989.

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1989 Final Research Report Summary
  • [Publications] Y.Takagaki, K.Ishibashi, K.Gamo, S.Namba, S.ishida, S.Takaoka, and K.Murase: "Dimensional Crossover of Electron-Electron Scattering in GaAs-AlGaAs Wires" Japanese Journal of Applied Physics: Vol.28, No.4, pp.645-648, 1989.

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1989 Final Research Report Summary
  • [Publications] Y.Takagaki, F.Wakaya, Y.Kusumi, S.Takaoka, Y.Yuba, K.Gamo, K.Murase and S.Namba: "Fabrication of Narrow Channels in GaAs-AlGaAs Heterostructures and the Lateral Quantization Effect" MicroElectronic Engineering: Vol.9, pp.353-356, 1989.

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1989 Final Research Report Summary
  • [Publications] Y.Takagaki, K.Gamo, S.Namba, S.Takaoka, K.Murase, and S.Ishida: "Overshoot of Magnetoresistance at GaAs-AlGaAs Narrow Wire Junctions" Solid Sate Communications: Vol.71, No.10, pp.809-812, 1989.

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1989 Final Research Report Summary
  • [Publications] Y.Takagaki, F.Wakaya, S.Takaoka, K.Gamo, K.Murase, and S.Namba: "Fabrication of Ballistic Quantum Wires and the Transport Properties" Japanese Journal of Applied Physics: Vol.28, No.10, pp.390-394, 1989.

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1989 Final Research Report Summary
  • [Publications] Y.Takagaki, K.Gamo, S.Namba, S.Ishida, S.Takaoka, and K.Murase: "Width Dependence of Magnetoresistance in GaAs-AlGaAs Wires Fabricated by Mesa Etching" Journal of Applied Physics: Vol.67, No.1, pp.340-343, 1990.

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1989 Final Research Report Summary
  • [Publications] Y.Liu, R.S.Zheng, S.Takaoka, K.Murase, K.Gamo and S.Namba: "Voltage Fluctuation in Mesoscopic Structures of Bismuth" Solid State Communications: Vol.73, No.10, pp.667-670, 1990.

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1989 Final Research Report Summary
  • [Publications] Y.Takagaki,K.Gamo,S.Namba,S.Takaoka,K.Murase,S.Ishida,K.Ishibashi,and Y.Aoyogai: "Nonlocal Voltage Fluctuations in a Quasi Ballistic Electron Waveguide" Solid State Communications. 69. 811-815 (1989)

    • Related Report
      1989 Annual Research Report
  • [Publications] Y.Takagaki,F.Wakaya,Y.Kusumi,S.Takaoka,Y.Yuba,K.Gamo,K.Murase,and S.Namba: "Fabrication of Narrow Channels in GaAs-AlGaAs Heterostructures and the Lateral Quantization Effect" MicroElectronic Engineering. 9. 353-356 (1989)

    • Related Report
      1989 Annual Research Report
  • [Publications] Y.Takagaki,K.Gamo,S.Namba,S.Takaoka,K.Murase,and S.Ishida: "Overshoot of Magnetoresistance at GaAs-AlGaAs Narrow Wire Junctions" Solid Sate Communications. 71. 809-812 (1989)

    • Related Report
      1989 Annual Research Report
  • [Publications] Y.Takagaki,F.Wakaya,S.Takaoka,K.Gamo,K.Murase,and S.Namba: "Fabrication of Ballistic Quantum Wires and the Transport Properties" Japanese Journal of Applied Physics. 28. 390-394 (1989)

    • Related Report
      1989 Annual Research Report
  • [Publications] Y.Takagaki,K.Gamo,S.Namba,S.Ishida,S.Takaoka,and K.Murase: "Width Dependence of Magnetoresistance in GaAs-AlGaAs Wires Fabricated by Mesa Etching" Journal of Applied Physics. 67. 340-343 (1990)

    • Related Report
      1989 Annual Research Report
  • [Publications] Y.Liu,R.S.Zheng,S.Takaoka,K.Murase,K.Gamo and S.Namba: "Voltage Fluctuation in Mesoscopic Stuctures of Bismuth" Solid State Communications. 73. 67-670 (1990)

    • Related Report
      1989 Annual Research Report
  • [Publications] Y.Takagaki;K.Gamo;S.Namba;S.Ishida;S.Takaoka;K.Murase;K.Ishibashi;Y.Aoyagi: Solid State Communication. 68. 1051-1054 (1988)

    • Related Report
      1988 Annual Research Report
  • [Publications] Y.Takagaki;K.Gamo;S.Namba;S.Takaoka;S.Ishida;K.Murase;K.Ishibshi;Y.Aoyagi: Solid State Communication. 69. 811-815 (1989)

    • Related Report
      1988 Annual Research Report
  • [Publications] Y.Liu;S.Takaoka;K.Murase: Solid State Communication. 67. 783-786 (1988)

    • Related Report
      1988 Annual Research Report
  • [Publications] Y.Takagaki;K.Ishibashi;S.Ishida;S.Takaoka;K.Gamo;K.Murase;S.Namba: Japanese Journal of Applied Physics.

    • Related Report
      1988 Annual Research Report
  • [Publications] Y.Takagaki;K.Gamo;S.Namba;S.Ishida;S.Takaoka;K.Murase: Journal of Applied Physics.

    • Related Report
      1988 Annual Research Report

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Published: 1988-04-01   Modified: 2016-04-21  

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