Published in

Physical Society of Japan, Journal of the Physical Society of Japan, 6(83), p. 061016, 2014

DOI: 10.7566/jpsj.83.061016

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Density Functional Theory for Plasmon-Assisted Superconductivity

Journal article published in 2014 by Ryosuke Akashi, Ryotaro Arita ORCID
This paper is made freely available by the publisher.
This paper is made freely available by the publisher.

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Abstract

We review the recent progress in the density functional theory for superconductors (SCDFT). Motivated by the long-studied plasmon mechanism of superconductivity, we have constructed an exchange-correlation kernel entering the SCDFT gap equation which includes the plasmon effect. For the case of lithium under high pressures, we show that the plasmon effect substantially enhances the transition temperature (Tc) by cooperating with the conventional phonon mechanism and results in a better agreement between the theoretical and experimentally observed Tc. Our present formalism will be a first step to density functional theory for unconventional superconductors. ; Comment: 9 pages, 7 figures; accepted for publication in J. Phys. Soc. Jpn. Special Topics; conference proceedings of The International Conference on Strongly Correlated Electron Systems (SCES) 2013