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Enhanced fluctuations of the tunneling density of states near the bottom of a Landau band measured by a local spectrometer

Holder, J P and Savchenko, A K and Falko, Vladimir and Jouault, B and Faini, G and Laruelle, F and Bedel, E (2000) Enhanced fluctuations of the tunneling density of states near the bottom of a Landau band measured by a local spectrometer. Physical review letters, 84 (7). pp. 1563-1566. ISSN 0031-9007

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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, omega(c)tau greater than or equal to 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.

Item Type: Article
Journal or Publication Title: Physical review letters
Subjects: Q Science > QC Physics
Departments: Faculty of Science and Technology
Faculty of Science and Technology > Physics
ID Code: 57047
Deposited By: ep_importer_pure
Deposited On: 03 Sep 2012 14:14
Refereed?: Yes
Published?: Published
Last Modified: 09 Apr 2014 23:58
Identification Number:
URI: http://eprints.lancs.ac.uk/id/eprint/57047

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