Enhanced Fluctuations of the Tunneling Density of States near the Bottom of a Landau Band Measured by a Local Spectrometer

J. P. Holder; A. K. Savchenko; Vladimir I. Fal'ko; B. Jouault; G. Faini; F. Laruelle; E. Bedel

Enhanced Fluctuations of the Tunneling Density of States near the Bottom of a Landau Band Measured by a Local Spectrometer

J. P. Holder^*, A. K. Savchenko, Vladimir I. Fal'ko, B. Jouault, G. Faini, F. Laruelle, E. Bedel

^*Corresponding author for this work

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Abstract

We have found that the local density of state fluctuations (LDOSF) in a disordered metal, detected using an impurity in the barrier as a spectrometer, undergo enhanced (with respect to Shubnikov-de Haas and de Haas-van Alphen effects) oscillations in strong magnetic fields, ω_cτ ≥ 1. We attribute this to the dominant role of the states near the bottom of Landau bands which give the major contribution to the LDOSF and are most strongly affected by disorder. We also demonstrate that in intermediate fields the LDOSF increase with field B in accordance with the results obtained in the diffusion approximation.

Original language	English
Pages (from-to)	1563-1566
Number of pages	4
Journal	Physical Review Letters
Volume	84
Issue number	7
Publication status	Published - 14 Feb 2000

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Cite this

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title = "Enhanced Fluctuations of the Tunneling Density of States near the Bottom of a Landau Band Measured by a Local Spectrometer",

abstract = "We have found that the local density of state fluctuations (LDOSF) in a disordered metal, detected using an impurity in the barrier as a spectrometer, undergo enhanced (with respect to Shubnikov-de Haas and de Haas-van Alphen effects) oscillations in strong magnetic fields, ωcτ ≥ 1. We attribute this to the dominant role of the states near the bottom of Landau bands which give the major contribution to the LDOSF and are most strongly affected by disorder. We also demonstrate that in intermediate fields the LDOSF increase with field B in accordance with the results obtained in the diffusion approximation.",

author = "Holder, {J. P.} and Savchenko, {A. K.} and Fal'ko, {Vladimir I.} and B. Jouault and G. Faini and F. Laruelle and E. Bedel",

year = "2000",

month = feb,

day = "14",

language = "English",

volume = "84",

pages = "1563--1566",

journal = "Physical Review Letters",

issn = "0031-9007",

publisher = "American Physical Society",

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TY - JOUR

T1 - Enhanced Fluctuations of the Tunneling Density of States near the Bottom of a Landau Band Measured by a Local Spectrometer

AU - Holder, J. P.

AU - Savchenko, A. K.

AU - Fal'ko, Vladimir I.

AU - Jouault, B.

AU - Faini, G.

AU - Laruelle, F.

AU - Bedel, E.

PY - 2000/2/14

Y1 - 2000/2/14

N2 - We have found that the local density of state fluctuations (LDOSF) in a disordered metal, detected using an impurity in the barrier as a spectrometer, undergo enhanced (with respect to Shubnikov-de Haas and de Haas-van Alphen effects) oscillations in strong magnetic fields, ωcτ ≥ 1. We attribute this to the dominant role of the states near the bottom of Landau bands which give the major contribution to the LDOSF and are most strongly affected by disorder. We also demonstrate that in intermediate fields the LDOSF increase with field B in accordance with the results obtained in the diffusion approximation.

AB - We have found that the local density of state fluctuations (LDOSF) in a disordered metal, detected using an impurity in the barrier as a spectrometer, undergo enhanced (with respect to Shubnikov-de Haas and de Haas-van Alphen effects) oscillations in strong magnetic fields, ωcτ ≥ 1. We attribute this to the dominant role of the states near the bottom of Landau bands which give the major contribution to the LDOSF and are most strongly affected by disorder. We also demonstrate that in intermediate fields the LDOSF increase with field B in accordance with the results obtained in the diffusion approximation.

UR - http://www.scopus.com/inward/record.url?scp=0000479912&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:0000479912

SN - 0031-9007

VL - 84

SP - 1563

EP - 1566

JO - Physical Review Letters

JF - Physical Review Letters

IS - 7

ER -

Enhanced Fluctuations of the Tunneling Density of States near the Bottom of a Landau Band Measured by a Local Spectrometer

Abstract

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