Clear experimental evidence for boundary and impurity scattering related crossover field scales in GaAs/AlGaAs split-gate wires

Y. Ochiai; K. Yamamoto; Y. Ohkubo; K. Ishibashi; J. P. Bird; Y. Aoyagi; T. Sugano; D. K. Ferry

doi:10.1006/spmi.1996.0023

Clear experimental evidence for boundary and impurity scattering related crossover field scales in GaAs/AlGaAs split-gate wires

Y. Ochiai, K. Yamamoto, Y. Ohkubo, K. Ishibashi, J. P. Bird, Y. Aoyagi, T. Sugano, D. K. Ferry

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

Abstract

We study the magnetic field dependence of the correlation field ΔB_c and amplitude δg of the conductance fluctuations, observed in the low temperature magnetoresistance of GaAs/AlGaAs split-gate wires. Near zero field, universality of quantum interference is retained and the magnetoresistance shows universal conductance fluctuations. At high magnetic fields, although the discrete Landau level quantization becomes resolved. ΔB_c and δg are found to increase linearly with magnetic field, with a slope which depends upon the nature of electron scatterings in the wire.

Original language	English (US)
Pages (from-to)	197-201
Number of pages	5
Journal	Superlattices and Microstructures
Volume	19
Issue number	3
DOIs	https://doi.org/10.1006/spmi.1996.0023
State	Published - Apr 1996

ASJC Scopus subject areas

General Materials Science
Condensed Matter Physics
Electrical and Electronic Engineering

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10.1006/spmi.1996.0023

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@article{d4a7b669e2d04b52b250d07b442e4b3f,

title = "Clear experimental evidence for boundary and impurity scattering related crossover field scales in GaAs/AlGaAs split-gate wires",

abstract = "We study the magnetic field dependence of the correlation field ΔBc and amplitude δg of the conductance fluctuations, observed in the low temperature magnetoresistance of GaAs/AlGaAs split-gate wires. Near zero field, universality of quantum interference is retained and the magnetoresistance shows universal conductance fluctuations. At high magnetic fields, although the discrete Landau level quantization becomes resolved. ΔBc and δg are found to increase linearly with magnetic field, with a slope which depends upon the nature of electron scatterings in the wire.",

author = "Y. Ochiai and K. Yamamoto and Y. Ohkubo and K. Ishibashi and Bird, {J. P.} and Y. Aoyagi and T. Sugano and Ferry, {D. K.}",

note = "Funding Information: Acknowledgements—We are grateful to the NEDO, {\textquoteleft}Nanostructures and Electron Waves Project{\textquoteright}, for their financial support. Also, the financial support of Grant-in-Aid for Scientific Research on Priority Areas supported by the Ministry of Education, Science and Culture {\textquoteleft}Quantum Coherent Electronics{\textquoteright}, is gratefully acknowledged.",

year = "1996",

month = apr,

doi = "10.1006/spmi.1996.0023",

language = "English (US)",

volume = "19",

pages = "197--201",

journal = "Superlattices and Microstructures",

issn = "0749-6036",

publisher = "Academic Press Inc.",

number = "3",

}

TY - JOUR

T1 - Clear experimental evidence for boundary and impurity scattering related crossover field scales in GaAs/AlGaAs split-gate wires

AU - Ochiai, Y.

AU - Yamamoto, K.

AU - Ohkubo, Y.

AU - Ishibashi, K.

AU - Bird, J. P.

AU - Aoyagi, Y.

AU - Sugano, T.

AU - Ferry, D. K.

N1 - Funding Information: Acknowledgements—We are grateful to the NEDO, ‘Nanostructures and Electron Waves Project’, for their financial support. Also, the financial support of Grant-in-Aid for Scientific Research on Priority Areas supported by the Ministry of Education, Science and Culture ‘Quantum Coherent Electronics’, is gratefully acknowledged.

PY - 1996/4

Y1 - 1996/4

N2 - We study the magnetic field dependence of the correlation field ΔBc and amplitude δg of the conductance fluctuations, observed in the low temperature magnetoresistance of GaAs/AlGaAs split-gate wires. Near zero field, universality of quantum interference is retained and the magnetoresistance shows universal conductance fluctuations. At high magnetic fields, although the discrete Landau level quantization becomes resolved. ΔBc and δg are found to increase linearly with magnetic field, with a slope which depends upon the nature of electron scatterings in the wire.

AB - We study the magnetic field dependence of the correlation field ΔBc and amplitude δg of the conductance fluctuations, observed in the low temperature magnetoresistance of GaAs/AlGaAs split-gate wires. Near zero field, universality of quantum interference is retained and the magnetoresistance shows universal conductance fluctuations. At high magnetic fields, although the discrete Landau level quantization becomes resolved. ΔBc and δg are found to increase linearly with magnetic field, with a slope which depends upon the nature of electron scatterings in the wire.

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DO - 10.1006/spmi.1996.0023

M3 - Article

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JO - Superlattices and Microstructures

JF - Superlattices and Microstructures

IS - 3

ER -

Clear experimental evidence for boundary and impurity scattering related crossover field scales in GaAs/AlGaAs split-gate wires

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