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Current-voltage characteristics of strained piezoelectric structures

J. Appl. Phys. 77, 1616 (1995); doi:10.1063/1.358916

Issue Date: 15 February 1995

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A. Bykhovski, B. Gelmont, and M. Shur
Department of Electrical Engineering, University of Virginia, Charlottesville, Virginia 22903-2442

A. Khan
APA Optics, 2950 N. E. 84th Lane, Blaine, Minnesota 55434
Experimental and theoretical studies are presented of the current-voltage characteristics of symmetrically doped n-type GaN-AlN-GaN semiconductor-insulator-semiconductor (SIS) structures. The asymmetry caused by the strain-induced electric field leads to the depletion layer barrier in addition to the barrier presented by a thin insulating layer of AlN. It is shown that the tunnel current depends on the degree of the elastic strain relaxation which, in turn, is related to the AlN film thickness. This dependence provides quantitative information about the film relaxation. This characterization technique is compared with the capacitance-voltage characterization of the SIS structures. The data indicate that the low bound of the conduction-band offset for the AlN/GaN heterointerface is close to 1 eV. ©1995 American Institute of Physics.
History: Received 4 May 1994; accepted 28 October 1994
Permalink: http://link.aip.org/link/?JAPIAU/77/1616/1
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KEYWORDS and PACS

Keywords
PACS
  • 73.40.Ty
    Electronic structure and electrical properties of surfaces, interfaces, and thin films Electronic transport in interface structures Semiconductorinsulatorsemiconductor structures
  • 77.84.Bw
    Dielectrics, piezoelectrics, and ferroelectrics and their properties Dielectric, piezoelectric, and ferroelectric materials Elements, oxides, nitrides, borides, carbides, chalcogenides, etc.
  • YEAR: 1995

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PUBLICATION DATA

ISSN:
0021-8979 (print)   1089-7550 (online)
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REFERENCES (15)
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