UNSPECIFIED. (2000) Quantum effects in hole-type Si/SiGe heterojunctions. LOW TEMPERATURE PHYSICS, 26 (8). pp. 609-614. ISSN 1063-777X

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Abstract

The temperature and magnetic-field dependences of the resistance of Si/SiGe heterojunctions with hole-type conductivity are investigated. It is shown that the features of these dependences are due to a manifestation of quantum interference effects - weak localization of the mobile charge carriers, and the hole-hole interaction in the two-dimensional electron system. On the basis of an analysis of the quantum interference effects, the temperature dependence of the dephasing time of the wave function of the charge carrier is determined: tau(Phi)=6.6x10(-12)T(-1) s. This dependence tau(Phi)proportional to T-1 must be regarded as a manifestation of hole-hole scattering processes in the two-dimensional electron system. The contribution to the magnetoresistance from the hole-hole interaction in the Cooper channel is extracted, and the corresponding interaction constant lambda(0)(C)approximate to 0.5 is found. (C) 2000 American Institute of Physics. [S1063-777X(00)01208-1].

Item Type:	Journal Article
Subjects:	Q Science > QC Physics
Journal or Publication Title:	LOW TEMPERATURE PHYSICS
Publisher:	AMER INST PHYSICS
ISSN:	1063-777X
Official Date:	August 2000
Dates:	Date Event August 2000 UNSPECIFIED
Volume:	26
Number:	8
Number of Pages:	6
Page Range:	pp. 609-614
Publication Status:	Published
URI:	http://wrap.warwick.ac.uk/id/eprint/13069

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