Temperature Dependence of the Chemical Potential in NaxCoO2: Implications for the Large Thermoelectric Power

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dc.creatorIshida, Y.
dc.creatorOhta, H.
dc.creatorFujimori, A.
dc.creatorHosono, H.
dc.date2005-11-07
dc.date2006-07-15
dc.date.accessioned2026-07-07T08:35:34Z
dc.date.available2026-07-07T08:35:34Z
dc.descriptionWe have performed a temperature-dependent photoemission study of a NaxCoO2 (x~0.8) epitaxial thin film prepared by the reactive solid-phase epitaxy method. The chemical potential shift as a function of temperature was derived from the Co 3d peak shift, and revealed a crossover from the degenerate Fermion state at low temperatures to the correlated hopping state of Co3+/Co4+ mixed-valence at high temperatures. This suggests that the large thermoelectric power at high temperatures should be considered in the correlated hopping picture.
dc.description5 pages, 4 figures
dc.identifierhttps://arxiv.org/abs/cond-mat/0511149
dc.identifierhttp://arxiv.org/abs/cond-mat/0511149
dc.identifierJ. Phys. Soc. Jpn., Vol.76, No.10, p.103709 (2007), selected as "Papers of Editors' Choice"
dc.identifierdoi:10.1143/JPSJ.76.103709
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/139789
dc.subjectStrongly Correlated Electrons
dc.subjectMaterials Science
dc.titleTemperature Dependence of the Chemical Potential in NaxCoO2: Implications for the Large Thermoelectric Power
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