The heterojunction parameters from a microscopic point of view

The use of surface-sensitive experimental techniques has produced in recent years important advances in the understanding of the microscopic nature of heterojunction parameters. In particular, valence band discontinuity has been measured for a large number of interfaces by photoemission spectroscopy and the results identify the LCAO approach by Harrison (1977) as the best first-order calculation of this parameter. Local effects, however, limit the accuracy of the estimate to 0.2-0.3 eV. Some evidence has been obtained to show that surface defects play an important role in the interface Fermi-level pinning for heterojunctions involving III-V compounds, and therefore in the establishment of the built-in potential


Year:
1983
Keywords:
Note:
Dept. of Phys., Univ. of Wisconsin, Madison, WI, USA
2166251
semiconductor interfaces
heterojunction parameters
surface-sensitive experimental techniques
microscopic nature
valence band discontinuity
photoemission spectroscopy
LCAO approach
surface defects
interface Fermi-level pinning
Laboratories:




 Record created 2006-10-03, last modified 2018-03-18


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