Valence band discontinuity at a cubic GaN/GaAs heterojunction measured by synchrotron-radiation photoemission spectroscopy

Ding, S. A. ; Barman, S. R. ; Horn, K. ; Yang, H. ; Yang, B. ; Brandt, O. ; Ploog, K. (1997) Valence band discontinuity at a cubic GaN/GaAs heterojunction measured by synchrotron-radiation photoemission spectroscopy Applied Physics Letters, 70 (18). pp. 2407-2409. ISSN 0003-6951

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Official URL: http://apl.aip.org/resource/1/applab/v70/i18/p2407...

Related URL: http://dx.doi.org/10.1063/1.118886

Abstract

The valence band discontinuity of the n-type cubic GaN/GaAs heterojunction is measured by means of angle-resolved photoemission spectroscopy using synchrotron radiation. High quality cubic GaN films are grown on GaAs(100) substrates by nitrogen plasma-assisted molecular beam epitaxy, and the valence band discontinuity is determined by a combination of core and valence level spectra. A value of ΔEV=(1.84±0.1) eV across the GaN/GaAs heterojunction is obtained, which means that the discontinuity in the conduction bands at this interface is very small, such that a vertical contact scheme may be realized for GaN/GaAs heterojunctions.

Item Type:Article
Source:Copyright of this article belongs to American Institute of Physics.
Keywords:Gallium Compounds; Gallium Arsenide; III-V Semiconductors; Semiconductor Heterojunctions; Valence Bands; Photoelectron Spectra; Semiconductor Epitaxial Layers; Core Levels; Interface States; Wide Band Gap Semiconductors
ID Code:64567
Deposited On:12 Oct 2011 05:04
Last Modified:12 Oct 2011 05:04

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