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Nonlocal Magnetoresistance of Diffusive Wires in High Magnetic-Fields

Main, P C; Geim, A K; Beton, P H; Eaves, L

Physica B. 1993;184(1-4):341-350.

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Abstract

We have used a nonlocal configuration of measurement probes to study the magnetoresistance of diffusive n+-GaAs wires at high magnetic fields where omega(c)tau > 1. At low temperatures we observe universal conductance fluctuations (UCF). For omega(c)tau > 1 there is a large increase in the Lee-Stone correlation field but the amplitude is unchanged in strong disagreement with the theoretical prediction. We conclude that the UCF in this regime cannot be scaled in terms of a single parameter, the phase coherence length. At higher temperatures, where the UCF are quenched, we observe qualitatively new magnetoresistance oscillations which have the same periodicity as Shubnikov-de Haas oscillations but differ from them in many important respects. In particular, the new oscillations disappear at low temperatures. This indicates the importance of dissipation in the measurement of nonlocal resistance. There is excellent agreement between the temperature dependence of the new oscillations and a simple model.

Bibliographic metadata

Type of resource:
Content type:
Published date:
Language:
english
Journal title:
Alternative journal title:
Physica B
ISSN:
Volume:
184
Issue:
1-4
Start page:
341
End page:
350
Total:
10
Pagination:
341-350
ISI Accession Number:
ISI:A1993KU62100069
Related website(s):
  • Related website <Go to ISI>://A1993KU62100069
General notes:
  • Ku621 Times Cited:2 Cited References Count:28
Access state:
Active

Institutional metadata

University researcher(s):

Record metadata

Manchester eScholar ID:
uk-ac-man-scw:192649
Created by:
Hawthornthwaite, Sabina
Created:
19th April, 2013, 15:06:22
Last modified by:
Hawthornthwaite, Sabina
Last modified:
19th April, 2013, 15:06:22

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