Energy dependence of quasi-particle relaxation in a disordered Fermi liquid.

Schmidt, T. and König, P. and McCann, E. and Falko, Vladimir I. and Haug, R. J. (2001) Energy dependence of quasi-particle relaxation in a disordered Fermi liquid. Physical review letters, 86 (2). pp. 276-279. ISSN 1079-7114

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A spectroscopic method is applied to measure the inelastic quasiparticle relaxation rate in a disordered Fermi liquid. The quasiparticle relaxation rate g is deduced from the magnitude of fluctuations in the local density of states, which are probed using resonant tunneling through a localized impurity state. We study its dependence on the excitation energy E measured from the Fermi level. In a disordered metal (heavily doped GaAs) we find that g ~ E32 within the experimentally accessible energy interval, in agreement with the Altshuler-Aronov theory for electron-electron interactions in diffusive conductors.

Item Type: Journal Article
Journal or Publication Title: Physical review letters
Additional Information: A new method of correlation function spectroscopy has been developed by McCann (and experimentally realised by the Nanostructures group of Haug at Hannover) to measure inelastic lifetime of quasi-particles in disordered conductors at very low excitation energies. RAE_import_type : Journal article RAE_uoa_type : Physics
Uncontrolled Keywords: /dk/atira/pure/researchoutput/libraryofcongress/qc
Departments: Faculty of Science and Technology > Physics
ID Code: 2355
Deposited By: ep_importer
Deposited On: 01 Apr 2008 14:34
Refereed?: Yes
Published?: Published
Last Modified: 01 Jan 2020 06:35

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