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
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Physical review letters
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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
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Deposited On:
01 Apr 2008 14:34
Last Modified:
17 Sep 2023 00:28