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Quantum effects in hole-type Si/SiGe heterojunctions
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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: |
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| Volume: | 26 | ||||
| Number: | 8 | ||||
| Number of Pages: | 6 | ||||
| Page Range: | pp. 609-614 | ||||
| Publication Status: | Published |
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