Dynamics of injected electron cooling in GaAs
作者:
J. R. Hayes,
A. F. J. Levi,
W. Weigmann,
期刊:
Applied Physics Letters
(AIP Available online 1986)
卷期:
Volume 48,
issue 20
页码: 1365-1367
ISSN:0003-6951
年代: 1986
DOI:10.1063/1.96911
出版商: AIP
数据来源: AIP
摘要:
Using the technique of hot‐electron spectroscopy we have measured the change in hot‐electron spectra with transit region width enabling us to obtain a dynamic picture of injected hot‐electron cooling inn+GaAs. All features in the spectra have been identified and ‘‘ballistic’’ transport has been observed for samples having narrow transit region widths (<850 A˚) while near diffusive transport has been observed for samples having wide transit region widths (>1700 A˚). With increasing transit region width, rather than the electron distribution shiftingenmasseto lower energies, electrons are removed from the initial injected peak and scattered to lower energies close to the Fermi energy. This process of electron cooling is dramatically illustrated by measuring the magnetic field dependence of the hot‐electron spectra.
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