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Spin-Splitting and Effective Mass of the 2-Dimensional Electron Gas in an Al0.6Ga0.4Sb/InAs Single Quantum Well

Published online by Cambridge University Press:  26 February 2011

M. O. Manasreh ,
Godfrey Gumbs ,
C. Zhang ,
I. Lo ,
C. A. Bozada ,
R. W. Dettmer ,
C. E. Stutz ,
K. R. Evans  and
W. C. Mitchel
M. O. Manasreh
Affiliation:
Wright Laboratory, Wright-Patterson Air Force Base, OH 45433–6543, U.S.A.
Godfrey Gumbs
Affiliation:
Department of Physics, Hunter College of the CUNY, 695 Park Avenue, New York, NY 10021, U. S. A.
C. Zhang
Affiliation:
TRIUMF, 4004 Wesbrook Mall, Vancouver, B. C, Canada V6T 2A3
I. Lo
Affiliation:
NRC Fellow, Wright Laboratory, Wright-Patterson Air Force Base, OH 45433–6533, U.S.A.
C. A. Bozada
Affiliation:
Wright Laboratory, Wright-Patterson Air Force Base, OH 45433–6543, U.S.A.
R. W. Dettmer
Affiliation:
Wright Laboratory, Wright-Patterson Air Force Base, OH 45433–6543, U.S.A.
C. E. Stutz
Affiliation:
Wright Laboratory, Wright-Patterson Air Force Base, OH 45433–6543, U.S.A.
K. R. Evans
Affiliation:
Wright Laboratory, Wright-Patterson Air Force Base, OH 45433–6543, U.S.A.
W. C. Mitchel
Affiliation:
Wright Laboratory, Wright-Patterson Air Force Base, OH 45433–6543, U.S.A.
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Abstract

The 2-dimensional electron gas (2DEG) in an Al0.6Ga0.4Sb/InAs single quantum well (SQW) is studied using cyclotron resonance (CR) and Shubnikov - de Haas (SdH) techniques. SdH results show spin-splitting in Landau levels at magnetic field strength (B) as low as 1.5T. The effective mass (m*) of the 2DEG was obtained from the peak positions of the CR transmission spectra. The results exhibit oscillatory behavior as a function of B. The m* value extracted from die temperature dependence of the SdH oscillations is in good agreement with the average value of m* obtained from CR measurements. The effective mass is calculated as a function of B using an electron self-energy model based on the Hartree-Fock approximation. The calculated m* values also show oscillatory behavior similar to that of the measured CR m*. Both experiment and theory show that m* maxima are shifted from the integral values (both odd and even) of the filling factors.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 240: Symposium E – Advanced III-V Compound Semiconductor Growth, Processing and Devices , 1991 , 765
Copyright
Copyright © Materials Research Society 1992

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References

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