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Quantum Interference Effect in Semiconductor quantum wires and applications to electron wave devices

Research Project

Project/Area Number 63420022
Research Category

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

Allocation TypeSingle-year Grants
Research Field Applied materials
Research InstitutionOsaka University

Principal Investigator

NAMBA Susumu  Osaka Univ., Faculty of Eng. Sci., Professor, 極限物質研究センター, 教授 (70029370)

Co-Investigator(Kenkyū-buntansha) YUBA Yoshihiko  Osaka Univ., Faculty of Eng. Sci., Research associate, 基礎工学部, 助手 (30144447)
TAKAI Mikio  Osaka Univ., Faculty of Eng. Sci., Associate Professor, 基礎工学部, 助教授 (90142306)
GAMO Kenji  Osaka Univ., Faculty of Eng. Sci., Professor, 基礎工学部 (70029445)
Project Period (FY) 1988 – 1989
Project Status Completed (Fiscal Year 1989)
Budget Amount *help
¥27,900,000 (Direct Cost: ¥27,900,000)
Fiscal Year 1989: ¥3,100,000 (Direct Cost: ¥3,100,000)
Fiscal Year 1988: ¥24,800,000 (Direct Cost: ¥24,800,000)
KeywordsNanofabrication / Mesoscopic phenomena / Quantum interference effects / Quantum Wires / Ballistic transport / ナノメートル加工 / アハラノフ / ボーム効果 / 電子波エレクトロニクス
Research Abstract

Recent advances in microfabrication techniques have made it possible to produce devices with submicron or smaller dimensions. These dimensions are smaller than the electron phase coherence length and elastic scattering length and various quantum interference effects becomes clearly observable. Basic research aiming to reveal the mechanisms of these effects and to search for new quantum effects is called "mesoscopic physics" and is becoming an important field in physics research. At the same time, the research is also important for future electronic devices or electron wave devices, which create functions by quite different principles from the present devices.
The present study aims to study the quantum transport effect in semiconducter nesoscopic structure which is important to establish basics for future device applications. Materials used in the present study were GaAs, GaAs/GaAlAs heterostructures. The major achievements are summarized as follows.
(1) Low energy focused ion beam system was fabricated and radiation damage was investigated in GaAs. We found that low damage process is possible for beam energy lower than lkev. (2) We compared damage effect on inelastic scattering length (lin) in GaAs/GaAlAs quantum wires fabricated using Ar ion milling and CC12F2 reactive ion etching (RIE) and found that the RIE induces less damage and gives longer lin (3) We studied ballistic transport effects and found large bend resistance and negative resistance. From the decay of these resistance, we found that the characteristic length for ballistic transport is much shorter than the elastic scattering length. (4) The effect of sample shape and radiation damage an the quantum transport effect was investigated. We fabricated FET's which has a new structure with plannar side gates and showed the possibility to control the quantum transport which is important for device applications.

Report

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

    (26 results)

All Other

All Publications (26 results)

  • [Publications] Y.Takagaki,K.Ishibashi,S.Ishida,S.Takaoka, K.Gamo,K.Murase and S.Namba: "“Dimensionsl Crossover of Electron-Electron Scattering in GaAs-AlGaAs Wire"" 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] M.Mizuno,K,Ishibashi.S.K.Noh,Y.Ochiai,Y.Aoyagi,K.Gamo,M.Kanabe and S.Namba: "“Aperiodic Conductance Fluctuations in a Narrow GaAs/AlGaAs wire"" Japanese Journal of Applied Physics. 28. L1025-L1028 (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 Four-Terminal Magnetoresistance at GaAs-AlGaAs Narrow wire Junctions" Solid Staie Commun.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.Wakays,S.Takaoka,K.Gamo,K.Murase and S.Namba: "“Fabrication of Ballistic Quantum wires and Their Tmnsport Properties"" Japanese Journal of Applied Physics. 28. 2188-2189 (1989)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1989 Final Research Report Summary
  • [Publications] J.Z.Yu,N.Masui,Y.Yuba,T.Hara,M.Hamaguchi,Y.Aoysgi,K.Gamo,and S.Namba,: "“Induc Delects in GaAs Etched by Low Energy Ions in Electro Beam Excited Plasna(EBEP)System"" Japanese Journal of Applied Physics. 28. 222-226 (1989)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1989 Final Research Report Summary
  • [Publications] T.Kosugi,K.Gamo,S.Namba,R.Mimura,and R.Aihara,: "“Low Energy FIB System and Application to Low Damage Microprocess"" Japanese Journal of Applied Physics(投稿中).

    • 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, S.Ishida, S.Takaoka, K.Gamo, K.Murase and S.Namba: "Dimensional Crossover of Electron-Electron Scattering in GaAs-AlGaAs Wire" Jpn. J. Appl. Phys.Vol.28. 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] M.Mizuno, K.Ishibashi, S.K.Noh, Y.Ochiai, Y.Aoyagi, K.Gamo, M.Kawabe and S.Namba: "Aperiodic Conductance Fluctuations in a Narrow GaAs/AlGaAs Wire" Jpn. J. Appl. Phys. Vol.28 pp.L1025-L1028 (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 Four-Terminal Magnetoresistance at GaAs-AlGaAs Narrow Wire Junctions" Solid State Commun. Vol.71 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 Their Transport Properties" Jpn. J. Appl. Phys. Vol. 28 pp.2188-2189 (1989).

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1989 Final Research Report Summary
  • [Publications] J.Z.Yu, N.Masui, Y.Yuba, T.Hara, M.Hamaguchi, Y.Aoyagi, K.Gamo and S.Namba: "Induced Defects in GaAs Etched by Low Energy Ions in Electron Beam Excited Plasma (EBEP) System" Jpn. J. Appl. Phys. Vol. 28 pp.222-226(1989).

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1989 Final Research Report Summary
  • [Publications] T.Kosugi, K.Gamo, S.Namba, R.Mimura and R.Aihara: "Low Energy FIB System and Application to Low Damage Microprocess" Jpn. J. Appl. Phys.

    • 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,S.Ishida,S.Takaoka,K.Gams,K.Murase and S.Namba: "“Dimensional Crossover of Elecrton-Electron Scattering in GaAs-AlGaAs Wive"" Japanese Journal of Applied Physics. 28. 645-648 (1989)

    • Related Report
      1989 Annual Research Report
  • [Publications] M.Mizuno,K.Ishibashi,S.K.Noh,Y.Ochiai,Y.Aoyagi,K.Gamo,M.Kawabe and S.Namba: "“Aperiodic Conductance Fluctuations in a Narrow GaAs/AlGaAs wive"" Japanese Journal of Applied Physics. 28. L1025-L1028 (1989)

    • Related Report
      1989 Annual Research Report
  • [Publications] Y.Takagaki,K.Gamo,S.Namba,S.Takaoka,K.Murase and S.Ishida: "“Overshoot of Four-Terminal Magnetoresistance at GaAs-AlGaAs Narrow wive Junctions" Solid Stase Commun.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 Their Transport Properties"" Japanes Jouranl of Applied Physics. 28. 2188-2189 (1989)

    • Related Report
      1989 Annual Research Report
  • [Publications] J.Z.Yu,N,Masui,Y,Yuba,T.Hara,M.Hamaguchi,Y.Aoyagi,K.Gamo and S.Namba: "“Induced Detects in GaAs Etched by Law Energy Ions in Electron Beam Excited Plasma(EBFP)System"" Japanese Journal of Applied Physics. 28. 222-226 (1989)

    • Related Report
      1989 Annual Research Report
  • [Publications] T.Kosugi,K.Gamo,S.Namba,R.Mimura and R.Aihara: "“Low Energy FIB System and Application to Low Damage Microprocess"" Japanese Journal of Applied Physics.

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

    • Related Report
      1988 Annual Research Report
  • [Publications] K.Gamo;H.Miyake;Y.Yuba;S.Namba;H.Kasahara;S.Sawaragi;R.Aihara: J.Vac.Sci.Technol.B6. 2124-2127 (1988)

    • Related Report
      1988 Annual Research Report
  • [Publications] H.Miyake;Y.Yuba;K.Gamo;S.Namba;R.Mimura;R.Aihara: Jpn.J.Appl.Phys.27. 12037-12039 (1988)

    • Related Report
      1988 Annual Research Report
  • [Publications] K.Ishibashi;Y.Takagaki;K.Gamo;S.Namba;S.Takaoka;K.Murase;S.Ishida;Y.Aoyagi: J.Vac.Sci.Technol.B6. 1852-1856 (1988)

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

    • 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] 難波進 編: "Ion Beam Modification of Materials." North Holland, (1989)

    • Related Report
      1988 Annual Research Report
  • [Publications] S.Namba.K.Murase;K.Gamo: "Nanostructure Fabrication and Science." Springer Verlag,

    • Related Report
      1988 Annual Research Report

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

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