Observation of Spin-Orbit Interaction Parameter Over a Wide Temperature Range Using Potentiometric Measurement

Title
Observation of Spin-Orbit Interaction Parameter Over a Wide Temperature Range Using Potentiometric Measurement
Authors
박윤호구현철김경호김형준장준연한석희김희중
Keywords
2-D electron gas layer (2DEG); potentiometric measurement; Rashba effect; spin-orbit interaction
Issue Date
2010-06
Publisher
IEEE transactions on magnetics
Citation
VOL 46, NO 6, 1562-1564
Abstract
Spin-orbit interaction parameter (α) can be obtained by measuring the Shubnikov-de Haas oscillation, but this method is valid at only very low temperature. The current induced spin polarization in a 2-D electron gas layer is measured by potentiometric geometry which measures spin dependent chemical potential shifts. Subsequently, a spin-orbit interaction parameter can be extracted up to T = 250 K. In an inverted In0.52Al0.48As/In0.53Ga0.47As/In0.52Al0.48 As quantum well system, α of 5.65 X 10-12 eVm and 3.85 X 10-12 eVm are obtained at T = 1.8 and 250 K, respectively.
URI
http://pubs.kist.re.kr/handle/201004/37472
ISSN
0018-9464
Appears in Collections:
KIST Publication > Article
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