Electron-wave interference effects in aGa1−xAlxAssingle-barrier structure measured by ballistic electron emission spectroscopy
作者:
D. K. Guthrie,
P. N. First,
T. K. Gaylord,
E. N. Glytsis,
R. E. Leibenguth,
期刊:
Applied Physics Letters
(AIP Available online 1997)
卷期:
Volume 71,
issue 16
页码: 2292-2294
ISSN:0003-6951
年代: 1997
DOI:10.1063/1.120053
出版商: AIP
数据来源: AIP
摘要:
Ballistic electron emission spectroscopy (BEES) has been performed on aGaAs/Ga0.8Al0.2As/GaAssingle-barrier structure at 77 and 7 K. The single-interface model widely used for such structures was found to be inadequate in describing the BEES second-derivative spectrum. A more complete model that incorporates electron-wave interference effects is shown to describe the data accurately and consistently over many spatial locations and samples. This model reproduces all measured features in the BEES second-derivative spectrum resulting from electron-wave interference. At 77 K (7 K) the conduction band offset forx=0.2is determined to be 145 meV orQc=0.58(150 meV orQc=0.60) in agreement with accepted values. ©1997 American Institute of Physics.
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