Jpn. J. Appl. Phys. 49 (2010) 014102 (4 pages)  |Previous Article| |Next Article|  |Table of Contents|
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Separating the Contribution of Mobility among Different Quantum Well Subbands

Il-Ho Ahn, G. Hugh Song, and Young-Dahl Jho

(Received July 15, 2009; accepted October 15, 2009; published online January 20, 2010)

Variable magnetic field Hall measurements were carried out to investigate carrier transport properties in a modulation-doped In_0.53Ga_0.47As/In_0.52Al_0.48As heterostructure over a broad temperature range from 10 to 300 K. Quantitative mobility-spectrum analysis (QMSA) and multicarrier fitting (MCF) analysis were then performed to separately extract information pertaining to the concentration and mobility associated with the first two quantum-well subbands. We thus present an analysis in which the scattering processes are relatively dominated by alloy disorder (optical phonon) for the first (second) subband to best fit the measured roll-over mobility characteristics in the high temperature region (>100 K).

URL: http://jjap.jsap.jp/link?JJAP/49/014102/
DOI: 10.1143/JJAP.49.014102

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