Electrothermal transport coefficients at finite frequencies

Details Electrothermal transport coefficients at finite frequencies Electrothermal transport coefficients at finite frequencies

Jan 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009rpph...72a6501s&link_type=abstract

Reports on Progress in Physics, Volume 72, Issue 1, pp. 016501 (2009).

Physics

13

Scientific paper

We review a recently developed formalism for computing thermoelectric coefficients in correlated matter. The usual difficulties of such a calculation are circumvented by a careful generalization of the transport formalism to finite frequencies, from which one can extract the high frequency objects. The technical parallel between the Hall constant and the Seebeck coefficient is explored and used to advantage. For small clusters, exact diagonalization gives the full spectrum for the Hubbard and especially the t-J model, a prototypical model for strong correlations, and this spectrum can be used to compute the exact finite frequency transport coefficients and hence to benchmark various approximations.
An application of this formalism to the physically important case of sodium cobaltate NaxCoO2 is made, and interesting predictions for new materials are highlighted.

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