Quantum Phase Transitions in the p-SiGe system

Details Quantum Phase Transitions in the p-SiGe system Quantum Phase Transitions in the p-SiGe system

1999-09-20

arxiv.org/abs/cond-mat/9909292v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

5 pages. 4 figures (needs moriand.sty, included). To appear in Proceedings of the XXXIV Rencontres de Moriand, January 1999

Scientific paper

The rich variety of phase transitions observed in the strained p-SiGe system are considered and compared. It is shown that the integer quantum Hall effect transitions, the Hall insulating transition and the re-entrant transition into an insulating phase near filling factor 3/2 are all very similar and good examples of quantum critical phase transitions. The B=0 metal insulator transition also shows many similarities to these transitions but requires the inclusion of an extra impurity scattering term to fully explain the data.

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