UNSPECIFIED (2003) Spin precession observation in quantum corrections to resistance of Si0.7Ge0.3/Si0.2Ge0.8 heterostructure with 2DHG. In: 23rd International Conference on Low Temperature Physics (LT23), AUG 20-27, 2002, HIROSHIMA, JAPAN.

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Abstract

The two-dimensional hole gas (2DHG) magnetoresistivity of a Si0.7Ge0.3/Si0.2Ge0.8 heterostructure in a wide range of temperatures T = 0.335-20 K and transport currents I = 100-50 muA is measured. In the vicinity of zero magnetic field, a sharp and positive in sign feature on smooth negative magnetoresistance is observed at the lowest temperatures. The amplitude of this feature quickly fades with increasing temperature and transport current. For the analysis of the experimental data the theory of weak localization for 2DHG is applied. The values of tau(so) and tau(tr) obtained are used for the first time to define zero magnetic field splitting in the hole energy spectrum for a Si0.7Ge0.3/Si0.2Ge0.8 heterostructure: Delta = 2.97 meV. (C) 2003 Published by Elsevier Science B.V.

Item Type:	Conference Item (UNSPECIFIED)
Subjects:	T Technology Q Science > QC Physics
Journal or Publication Title:	PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
Publisher:	ELSEVIER SCIENCE BV
ISSN:	1386-9477
Date:	May 2003
Volume:	18
Number:	1-3
Number of Pages:	2
Page Range:	pp. 145-146
Publication Status:	Published
Title of Event:	23rd International Conference on Low Temperature Physics (LT23)
Location of Event:	HIROSHIMA, JAPAN
Date(s) of Event:	AUG 20-27, 2002
URI:	http://wrap.warwick.ac.uk/id/eprint/9631

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