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Electronic Transport in a Quasi-Ballistic Narrow Wire Confined by Split Metal Gates

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Science and Technology of Mesoscopic Structures

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Summary

A quasi-ballistic narrow channel was confined in a 2 dimensional electron gas (2DEG) formed at the heterointerface between GaAs and AlGaAs in terms of split metallic gates defined by electron beam lithography. Magnetoresistance (MR) measurements were made at 1.2 K and under a magnetic field of up to 8 T. Shubnikov-de Haas (SdH) oscillations and conductance fluctuations were observed. The effect of side wall scatterings on the relaxation process and the width dependence of conductance fluctuations were studied. It was found that (1) in high magnetic fields where edge states begin to be important, scattering with side walls was a dominant relaxation mechanism, and (2) the amplitude of conductance fluctuations began to decrease from a constant value with decreasing width. The observed effects were specific to the quasi-ballistic transport regime.

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Author information

Authors and Affiliations

  1. Frontier Research Program, RIKEN, 2-1 Hirosawa, Wako City, Saitama, 351-01, Japan

    Susumu Namba

  2. Institute of Materials Science, University of Tsukuba, Tsukuba, Ibaraki, 351-01, Japan

    Mitsuo Kawabe

Authors
  1. Koji Ishibashi
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  2. Yoshinobu Aoyagi
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  3. Susumu Namba
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  4. Yuichi Ochiai
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  5. Mitsuo Kawabe
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Editor information

Editors and Affiliations

  1. 536 Aba-machi, 851-01, Nagasaki, Japan

    Susumu Namba (Professor Emeritus of Osaka University, Professor of Nagasaki Institute of Applied Science) (Professor Emeritus of Osaka University, Professor of Nagasaki Institute of Applied Science)

  2. Department of Electronic Engineering, Osaka University, Yamadaoka 2-1, Suita City, Osaka, 565, Japan

    Chihiro Hamaguchi (Professor) (Professor)

  3. Institute for Solid State Physics, University of Tokyo, 7-22-1 Roppongi, Minato-ku, Tokyo, 106, Japan

    Tsuneya Ando (Professor) (Professor)

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© 1992 Springer Japan

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Ishibashi, K., Aoyagi, Y., Namba, S., Ochiai, Y., Kawabe, M. (1992). Electronic Transport in a Quasi-Ballistic Narrow Wire Confined by Split Metal Gates. In: Namba, S., Hamaguchi, C., Ando, T. (eds) Science and Technology of Mesoscopic Structures. Springer, Tokyo. https://doi.org/10.1007/978-4-431-66922-7_11

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  • DOI: https://doi.org/10.1007/978-4-431-66922-7_11

  • Publisher Name: Springer, Tokyo

  • Print ISBN: 978-4-431-66924-1

  • Online ISBN: 978-4-431-66922-7

  • eBook Packages: Springer Book Archive

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