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Condensed Matter > Strongly Correlated Electrons
Title: Potential energy contribution to the thermopower of correlated electrons
(Submitted on 3 Dec 2020 (v1), last revised 14 Dec 2020 (this version, v2))
Abstract: Certain classes of strongly correlated systems promise high thermopower efficiency, but a full understanding of correlation effects on the Seebeck coefficient is lacking. This is partly due to limitations of Boltzmann-type approaches. One needs a formula for the thermopower that allows separate investigations of the kinetic and potential energy contributions to the evolution with temperature and doping of the thermopower. Here we address this issue by deriving for Hubbard-like interactions a formula for the thermopower that separates the potential from the kinetic energy contribution and facilitates a better understanding of correlation effects on the Seebeck coefficient. As an example, the thermopower of the one-band Hubbard model is calculated from dynamical mean-field. For interactions in both the intermediate and strong correlation limit, the contributions from kinetic and potential energy nearly cancel.
Submission history
From: André-Marie Tremblay [view email][v1] Thu, 3 Dec 2020 15:39:48 GMT (32kb,D)
[v2] Mon, 14 Dec 2020 03:29:05 GMT (27kb,D)
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