Transport properties of strongly correlated metals: A dynamical mean-field approach

Merino, J and McKenzie, RH (2000) Transport properties of strongly correlated metals: A dynamical mean-field approach. Physical Review B, 61 12: 7996-8008. doi:10.1103/PhysRevB.61.7996

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Author Merino, J
McKenzie, RH
Title Transport properties of strongly correlated metals: A dynamical mean-field approach
Journal name Physical Review B   Check publisher's open access policy
ISSN 1098-0121
Publication date 2000
Sub-type Article (original research)
DOI 10.1103/PhysRevB.61.7996
Open Access Status File (Publisher version)
Volume 61
Issue 12
Start page 7996
End page 8008
Total pages 13
Language eng
Abstract The temperature dependence of the transport properties of the metallic phase of a frustrated Hubbard model on the hypercubic lattice at half-filling is calculated. Dynamical mean-held theory, which maps the Hubbard model onto a single impurity,Anderson model that is solved self-consistently, and becomes exact in the limit of large dimensionality, is used. As the temperature increases there is a smooth crossover from coherent Fermi liquid excitations at low temperatures to incoherent excitations at high temperatures. This crossover leads to a nonmonotonic temperature dependence for the resistance, thermopower, and Hall coefficient, unlike in conventional metals. The resistance smoothly increases from a quadratic temperature dependence at low temperatures to large values which can exceed the Mott-Ioffe-Regel value ha/e(2) (where a is a lattice constant) associated with mean free paths less than a lattice constant. Further signatures of the thermal destruction of quasiparticle excitations are a peak in the thermopower and the absence of a Drude peak in the optical conductivity. The results presented here are relevant to a wide range of strongly correlated metals, including transition metal oxides, strontium ruthenates, and organic metals.
Keyword Physics, Condensed Matter
Layered Perovskite Superconductor
Dimensional Hubbard-model
Impurity Anderson Model
Fermi-liquid Behavior
Heavy-fermion
Thermoelectric-power
Electronic-structure
Infinite Dimensions
Electrical-resistivity
Infrared Conductivity
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Unknown

Document type: Journal Article
Sub-type: Article (original research)
Collections: Centre for Organic Photonics and Electronics
School of Physical Sciences Publications
 
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Citation counts: TR Web of Science Citation Count  Cited 163 times in Thomson Reuters Web of Science Article | Citations
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Created: Mon, 13 Aug 2007, 11:41:21 EST