Quantum transport in diffusive microstructures in high magnetic fields

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

doi:10.1006/spmi.1993.1003

Quantum transport in diffusive microstructures in high magnetic fields

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

Research output: Contribution to journal › Article › peer-review

Abstract

We have studied magnetotransport in diffusive submicron wires (n+-GaAs) at high magnetic fields where ωcτ>1. The system allowed us to follow a transition from orthodox mesoscopic behaviour to the regime of edge state transport. We found that for ωcτ>1 the universal conductance fluctuations (UCF) can no longer be scaled in terms of only one parameter, the phase coherence length. This breakdown of universal scaling is seen as a large increase of the Lee-Stone correlation field while the magnitude of UCF is unchanged in strong disagreement with the theoretical prediction. A qualitatively new magnetoresistance oscillatory effect has been observed at intermediate temperatures (10K

Original language	English
Pages (from-to)	11
Journal	Superlattices and microstructures
Volume	13
Issue number	1
DOIs	https://doi.org/10.1006/spmi.1993.1003
Publication status	Published - Jan 1993

Keywords

conductance fluctuations
weak localization
temperature
magnetoresistance
conductivity
resistance
contacts
length
wires

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10.1006/spmi.1993.1003

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title = "Quantum transport in diffusive microstructures in high magnetic fields",

abstract = "We have studied magnetotransport in diffusive submicron wires (n+-GaAs) at high magnetic fields where ωcτ>1. The system allowed us to follow a transition from orthodox mesoscopic behaviour to the regime of edge state transport. We found that for ωcτ>1 the universal conductance fluctuations (UCF) can no longer be scaled in terms of only one parameter, the phase coherence length. This breakdown of universal scaling is seen as a large increase of the Lee-Stone correlation field while the magnitude of UCF is unchanged in strong disagreement with the theoretical prediction. A qualitatively new magnetoresistance oscillatory effect has been observed at intermediate temperatures (10K",

keywords = "conductance fluctuations, weak localization, temperature, magnetoresistance, conductivity, resistance, contacts, length, wires",

author = "Geim, {A. K.} and Main, {P. C.} and L. Eaves and Beton, {P. H.}",

note = "Kk137 Times Cited:4 Cited References Count:31",

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TY - JOUR

T1 - Quantum transport in diffusive microstructures in high magnetic fields

AU - Geim, A. K.

AU - Main, P. C.

AU - Eaves, L.

AU - Beton, P. H.

N1 - Kk137 Times Cited:4 Cited References Count:31

PY - 1993/1

Y1 - 1993/1

N2 - We have studied magnetotransport in diffusive submicron wires (n+-GaAs) at high magnetic fields where ωcτ>1. The system allowed us to follow a transition from orthodox mesoscopic behaviour to the regime of edge state transport. We found that for ωcτ>1 the universal conductance fluctuations (UCF) can no longer be scaled in terms of only one parameter, the phase coherence length. This breakdown of universal scaling is seen as a large increase of the Lee-Stone correlation field while the magnitude of UCF is unchanged in strong disagreement with the theoretical prediction. A qualitatively new magnetoresistance oscillatory effect has been observed at intermediate temperatures (10K

AB - We have studied magnetotransport in diffusive submicron wires (n+-GaAs) at high magnetic fields where ωcτ>1. The system allowed us to follow a transition from orthodox mesoscopic behaviour to the regime of edge state transport. We found that for ωcτ>1 the universal conductance fluctuations (UCF) can no longer be scaled in terms of only one parameter, the phase coherence length. This breakdown of universal scaling is seen as a large increase of the Lee-Stone correlation field while the magnitude of UCF is unchanged in strong disagreement with the theoretical prediction. A qualitatively new magnetoresistance oscillatory effect has been observed at intermediate temperatures (10K

KW - conductance fluctuations

KW - weak localization

KW - temperature

KW - magnetoresistance

KW - conductivity

KW - resistance

KW - contacts

KW - length

KW - wires

U2 - 10.1006/spmi.1993.1003

DO - 10.1006/spmi.1993.1003

M3 - Article

SN - 1096-3677

VL - 13

SP - 11

JO - Superlattices and microstructures

JF - Superlattices and microstructures

IS - 1

ER -

Quantum transport in diffusive microstructures in high magnetic fields

Abstract

Keywords

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