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Microwave reflection study of ultra-high mobility GaAs/AlGaAs 2D-electron system at large filling factors

Published online by Cambridge University Press:  27 January 2014

Tianyu Ye ,
Ramesh Mani  and
Werner Wegscheider
Tianyu Ye
Affiliation:
Department of Physics and Astronomy, Georgia State University, Atlanta, GA 30303, USA.
Ramesh Mani
Affiliation:
Department of Physics and Astronomy, Georgia State University, Atlanta, GA 30303, USA.
Werner Wegscheider
Affiliation:
Laboratorium für Festkörperphysik, ETH Zürich, 8093 Zurich, Switzerland.
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Abstract

The microwave-induced magnetoresistance oscillations are exhibited by the GaAs/AlGaAs two dimensional electron system (2DES) under microwave and terahertz photo-excitation at liquid helium temperatures. Such oscillations are presently understood in terms of various theories. In order to identify the relative physical contributions, we have concurrently examined magnetotransport and microwave reflection from the 2DES. For the reflection measurements, a sensitive microwave detector was assimilated into the standard experimental setup. Here, we correlate changes in reflection with the concurrent transport response of the photo-excited 2DES.

Keywords

radiation effectsmagnetoresistance (transport)photoreflectance
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1635: Symposium T – Compound Semiconductor Materials and Devices , 2014 , pp. 69 - 74
Copyright
Copyright © Materials Research Society 2014 

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References

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