Separating the Contribution of Mobility among Different Quantum Well Subbands

Variable magnetic field Hall measurements were carried out to investigate carrier transport properties in a modulation-doped In 0.53 Ga 0.47 As/In 0.52 Al 0.48 As heterostructure over a broad temperature range from 10 to 300 K. Quantitative mobility-spectrum analysis (QMSA) and multicarrier fitting...

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Bibliographic Details
Published in:Japanese Journal of Applied Physics 2010-01, Vol.49 (1), p.014102-014102-4
Main Authors: Ahn, Il-Ho, Song, G. Hugh, Jho, Young-Dahl
Format: Article
Language:English
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Summary:Variable magnetic field Hall measurements were carried out to investigate carrier transport properties in a modulation-doped In 0.53 Ga 0.47 As/In 0.52 Al 0.48 As 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).
ISSN:0021-4922
1347-4065
DOI:10.1143/JJAP.49.014102