WEAK-LOCALIZATION AND ELECTRON-ELECTRON INTERACTION IN SI SIGE QUANTUM-WELLS/

Authors
PRINZ A STOGER G BRUNTHALER G BAUER G ISMAIL K MEYERSON BS
Citation
A. Prinz et al., WEAK-LOCALIZATION AND ELECTRON-ELECTRON INTERACTION IN SI SIGE QUANTUM-WELLS/, Acta Physica Polonica. A, 88(5), 1995, pp. 873-876
Citations number
17
Categorie Soggetti
Physics
Journal title
Acta Physica Polonica. A → ACNP
ISSN journal
05874246
Volume
88
Issue
5
Year of publication
1995
Pages
873 - 876
Database
ISI
SICI code
0587-4246(1995)88:5<873:WAEIIS>2.0.ZU;2-6
Abstract
A negative magnetoresistance is observed in Si/SiGe modulation doped h eterostructures which is attributed to the single particle quantum int erference (weak localization) effect. From analysis of the experimenta l data the electron phase coherence time tau phi is extracted to follo w a (aT + bT(2))(-1) dependence. The evaluated prefactor alpha = 0.25 is below the theoretical limit of 0.5, but agrees with observations in Si and GaAs/AlGaAs heterostructures.