The Library
Magnetotransport anomalies in dilute two-dimensional electron systems: An experiment and a model
Tools
UNSPECIFIED (1996) Magnetotransport anomalies in dilute two-dimensional electron systems: An experiment and a model. In: 11th International Conference on the Electronic Properties of 2-Dimensional Systems (EP2DS XI), UNIV NOTTINGHAM, NOTTINGHAM, ENGLAND, AUG 07-11, 1995. Published in: Surface Science, 362 (1-3). pp. 933-936. ISSN 0039-6028.
Research output not available from this repository.
Request-a-Copy directly from author or use local Library Get it For Me service.
Abstract
Magnetotransport characteristics of dilute two-dimensional hole gases (2DHGs) in Si/SiGe heterostructures are shown to have two types of anomalous behaviour. (1) With increasing magnetic field, the normal sequence of quantum Hall effect states is interrupted by the appearance of the insulating state in the region of filling factor two, which in turn is replaced by the i=1 quantum Hall effect state. Tilting the sample plane relative to the magnetic field direction increases dramatically the degree of insulating behaviour. (2) In a similar heterostructure, but with a higher areal density of holes, the insulating state is not observed. However the measured, almost quantised, value of the Hall conductivity turns out So be different from that expected from the shubnikov-de Haas oscillation periodicity. A new model which describes quantum transport in terms of percolation phenomena, predicting a nonmonotonic dependence of Hall conductivity on magnetic field, is shown to be capable of explaining the data.
Item Type: | Conference Item (UNSPECIFIED) | ||||
---|---|---|---|---|---|
Subjects: | Q Science > QD Chemistry Q Science > QC Physics |
||||
Journal or Publication Title: | Surface Science | ||||
Publisher: | ELSEVIER SCIENCE BV | ||||
ISSN: | 0039-6028 | ||||
Official Date: | 1996 | ||||
Dates: |
|
||||
Volume: | 362 | ||||
Number: | 1-3 | ||||
Number of Pages: | 4 | ||||
Page Range: | pp. 933-936 | ||||
Publication Status: | Published | ||||
Title of Event: | 11th International Conference on the Electronic Properties of 2-Dimensional Systems (EP2DS XI) | ||||
Location of Event: | UNIV NOTTINGHAM, NOTTINGHAM, ENGLAND | ||||
Date(s) of Event: | AUG 07-11, 1995 |
Data sourced from Thomson Reuters' Web of Knowledge
Request changes or add full text files to a record
Repository staff actions (login required)
View Item |