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Study of hot electron effect in sub-micron semiconductor devices.

Research Project

Project/Area Number 60550228
Research Category

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

Allocation TypeSingle-year Grants
Research Field 電子材料工学
Research InstitutionNAGOYA UNIVERSITY

Principal Investigator

SAWAKI Nobuhiko  Nagoya University, School of Engineering., 工学部, 助教授 (70023330)

Co-Investigator(Kenkyū-buntansha) AKASAKI Isamu  Nagoya University, School of Engineering., 工学部電子工学科, 教授 (20144115)
Project Period (FY) 1985 – 1986
Project Status Completed (Fiscal Year 1986)
Budget Amount *help
¥2,000,000 (Direct Cost: ¥2,000,000)
Fiscal Year 1986: ¥800,000 (Direct Cost: ¥800,000)
Fiscal Year 1985: ¥1,200,000 (Direct Cost: ¥1,200,000)
KeywordsSub-micron electron device / Hot electron / Hetero-structure / Superlattice / Phonon scattering / Impurity scattering / Real space transfer / ホトルミネセンス
Research Abstract

The performance of a submicron semiconductor device is strongly affected by the dynamical properties of hot electrons in such a short time scale as a pico second. In a compound semiconductor device, the electron-polar optical phonon interaction predominates the scattering phenomena. In this project, we have studied the quantum size effect on the interaction of hot electrons with ionized impurities and the polar optical phonons in hetero-structures and/or superlattices.
We studied numerically the lattice dynamics of hetero-structures and/or superlattices and found that the layered structure does have a strong influence on the optical modes, which are localized within the layers, while the acoustical mode suffers only a slight modification. We proposed a formula for the interaction of electron-localized optical phonons.
According to the results mentioned above, the well width dependence of the electron-phonon interaction was studied, and it was shown that the narrower the quantum well is, the longer becomes the relaxation time and the smaller is the binding energy of polarons. The interaction in 2-dimensional system is shown to become more of the short range nature in comparison with the 3-dimensional one.
The photo-luminescence spectra of double quantum well superlattice made of GaAs/AlGaAs system was studied. The sample was subjected to the electric field applied parallel to the hetero-interface at cryogenic temperatures. By investigating the variation of the spectra as a function of the electric field as well as the electron temperature, the real space transfer or the inter-sub-band transition via the electron-impurity or the electron-phonon interaction was confirmed for the first time.

Report

(1 results)
  • 1986 Final Research Report Summary
  • Research Products

    (8 results)

All Other

All Publications (8 results)

  • [Publications] Nobuhiko Sawaki: Physica B. 134B. 494-498 (1985)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1986 Final Research Report Summary
  • [Publications] Nobuhiko Sawaki: Surface Science. 170. 537-541 (1986)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1986 Final Research Report Summary
  • [Publications] Nobuhiko Sawaki: J.Physics C:Solid State Physics. 19. 4965-4975 (1986)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1986 Final Research Report Summary
  • [Publications] Nobuhiko Sawaki: Superlattices and Microstructures. 2. 281-285 (1986)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1986 Final Research Report Summary
  • [Publications] Nobuhiko Sawaki: "Scattering and real space transfer in multi-quantum well structures." Physica B. 134B. 494-498 (1985)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1986 Final Research Report Summary
  • [Publications] Nobuhiko Sawaki: "Interaction of two-dimensional electrons and polar optical phonons in a superlattice." Surface Science. 170. 537-541 (1986)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1986 Final Research Report Summary
  • [Publications] Nobuhiko Sawaki: "On the reduction of the electron-LO phonon scattering in a semiconductor superlattice." J.Physics C:Solid State Physics. 19. 4965-4975 (1986)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1986 Final Research Report Summary
  • [Publications] Nobuhiko Sawaki: "Photo-luminescence studies of hot electrons and real space transfer effect in a double quantum well superlattice." Superlattices and Microstructures. 2. 281-285 (1986)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1986 Final Research Report Summary

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Published: 1987-03-31   Modified: 2016-04-21  

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