Transition from a Single- to Double-Quantum-Well Magnetotransport in the p-GeSi/Ge/p-GeSi Heterosystem
Abstract
As revealed from the high field low temperature magnetotransport measurements the joint quasi two dimensional hole gas with the density Ps (3-5) x 10(exp15)/m2 exists in a p-GeSi/Ge/p-GeSi quantum well up to the Ge layer widths dw < 25 nm, but it separates in two sublayers located at the well's sidewalls at Ps approx. = 5 x 10(exp15)/m2 and d(w) somewhat > 35 nm. The sublayers have approximately equal resistances indicating similarity of the normal and inverted interfaces in ths heterosystem. The recendy discovered quantized Hall insulator phase was detected here only in the intermediate range of sublayer separations yielding evidence that the intersublayer correlations are important to stabilize this state.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 23, 2000
- Accession Number
- ADP013125
Entities
People
- G. A. Alshanskii
- M. V. Yakunin
- O. A. Kuznetsov
- V. N. Neverov
- Yu. G. Arapov
Organizations
- Russian Academy of Sciences