Origin of large thermopower in LiRh$_2$O$_4$
| dc.creator | Arita, R. | |
| dc.creator | Kuroki, K. | |
| dc.creator | Held, K. | |
| dc.creator | Lukoyanov, A. V. | |
| dc.creator | Skornyakov, S. | |
| dc.creator | Anisimov, V. I. | |
| dc.date | 2008-06-16 | |
| dc.date | 2008-10-01 | |
| dc.date.accessioned | 2026-07-07T10:06:18Z | |
| dc.date.available | 2026-07-07T10:06:18Z | |
| dc.description | 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. | |
| dc.description | 5 pages, 5 figures | |
| dc.identifier | https://arxiv.org/abs/0806.2506 | |
| dc.identifier | http://arxiv.org/abs/0806.2506 | |
| dc.identifier | Phys. Rev. B 78, 115121 (2008) | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/170280 | |
| dc.subject | Strongly Correlated Electrons | |
| dc.subject | Materials Science | |
| dc.title | Origin of large thermopower in LiRh$_2$O$_4$ | |
| dc.type | text |