Can I read Origin of large thermopower in LiRh$ 2$O$ 4$ on EtoBox?

Origin of large thermopower in LiRh$ 2$O$ 4$ by Arita, R.; Kuroki, K.; Held, K.; Lukoyanov, A. V.; Skornyakov, S.; Anisimov, V. I. is a scholarly article available to read on EtoBox.

What is Origin of large thermopower in LiRh$ 2$O$ 4$ about?

Motivated by the newly synthesized mixed-valent spinel LiRh$_2$O$_4$ for which a large thermopower is observed in the metallic cubic phase above 230K [Okamoto {\it et al.} (arXiv:0806.2504)], we calculate the Seebeck coefficient by the combination of local density approximation and dynamical mean field theory (LDA+DMFT). The experimental values are well reproduced not only by LDA+DMFT but also by the less involved Boltzmann equation approach. A careful analysis of the latter shows unexpectedly that the origin of the large thermopower shares a common root with a very different oxide: Na$_x$CoO$_2$. We also discuss how it is possible to further increase the powerfactor of LiRh$_2$O$_4$ through doping, which makes the material even more promoising for technological applications.

Author

Arita, R.; Kuroki, K.; Held, K.; Lukoyanov, A. V.; Skornyakov, S.; Anisimov, V. I.

Published

2008

Language

EN