Classical Edge Magnetoplasmon in a GaAs/AlGaAs Two-Dimensional Electron System.

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  • Tonouchi Masayoshi
    Department of Computer Science and Electronics, Kyushu Institute of Technology, Iizuka, Fukuoka 820
  • Miyasato Tatsuro
    Department of Computer Science and Electronics, Kyushu Institute of Technology, Iizuka, Fukuoka 820
  • Hawker P.
    Department of Physics, University of Nottingham, University Park, Nottingham NG7 2RD, UK
  • Cheng T. S.
    Department of Physics, University of Nottingham, University Park, Nottingham NG7 2RD, UK
  • Rampton V. W.
    Department of Physics, University of Nottingham, University Park, Nottingham NG7 2RD, UK

書誌事項

タイトル別名
  • Classical Edge Magnetoplasmon in a GaAs
公開日
1994
DOI
  • 10.1143/jpsj.63.4499
公開者
一般社団法人 日本物理学会

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説明

We have studied the edge magnetoplasmon (EMP) in a GaAs/AlGaAs two-dimensional electron gas (2DEG) system under conditions where the quantum Hall effect (QHE) is not observed; we call this a classical EMP. The classical EMP's are excited in a 2DEG disk by radio frequency electric field excitation (≤ 1, GHz) in a high magnetic field B (≤ 5, T) with the 2DEG sheet carrier density ns between 2× 1015, m-2 and 1× 1016, m-2. The resonant frequency is found to be almost proportional to ns and inversely proportional to B, which agrees quantitatively with the theory proposed by Volkov and Mikhailov, Sov. Phys.-JETP 67 (1988) 1639 by assuming the effective dielectric constant ε\circ =(1+ε GaAs)/2 where ε GaAs is appropriate to the GaAs. A comparison of the experimental results with the calculations revealed that the electron mobility plays an important role in the definition of the EMP frequency.

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