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Electrical Characterization of Highly Strained Ultrathin InAs/GaAs Quantum Wells

Published online by Cambridge University Press:  21 February 2011

F. Yu ,
R. Droopad ,
G.N. Maracas ,
J. Liu ,
R. Rajesh  and
R.W. Carpenter
F. Yu
Affiliation:
Department of Electrical Engineering and Center for Solid State Electronics Research, Arizona State University, Tempe, Arizona 85287-6206
R. Droopad
Affiliation:
Department of Electrical Engineering and Center for Solid State Electronics Research, Arizona State University, Tempe, Arizona 85287-6206
G.N. Maracas
Affiliation:
Department of Electrical Engineering and Center for Solid State Electronics Research, Arizona State University, Tempe, Arizona 85287-6206
J. Liu
Affiliation:
Center for Solid State Science, Arizona State University, Tempe, Arizona 85287
R. Rajesh
Affiliation:
Center for Solid State Science, Arizona State University, Tempe, Arizona 85287
R.W. Carpenter
Affiliation:
Center for Solid State Science, Arizona State University, Tempe, Arizona 85287
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Abstract

Recent studies have shown that highly strained InAs/GaAs quantum wells of high crystalline quality can be grown by conventional solid source molecular beam epitaxy. These wells have been optically characterized by photoluminescence and structurally characterized by electron microscopy. We present the first report of the electrical investigation of InAs/GaAs quantum well confined electronic states using capacitance transient spectroscopy and steady state capacitance-voltage profiling techniques. These measurements are combined with high resolution electron microscopy and high-angle annular dark-field (HAADF) imaging to characterize the highly strained ultrathin quantum wells and heterointerfaces. HAADF, in conjunction with nanometer resolution X-ray analysis, gives the compositional distribution of the InAs monolayers. Correlation with photoluminescence is also performed.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 326: Symposium M – Growth, Processing, and Characterization of Semiconductor Heterostructures , 1993 , 151
Copyright
Copyright © Materials Research Society 1994

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