Fermi surface evolution and Luttinger theorem in Na$_x$CoO$_2$: a systematic photoemission study

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dc.creatorYang, H. -B.
dc.creatorPan, Z. -H.
dc.creatorSekharan, A. K. P.
dc.creatorSato, T.
dc.creatorSouma, S.
dc.creatorTakahashi, T.
dc.creatorJin, R.
dc.creatorSales, B. C.
dc.creatorMandrus, D.
dc.creatorFedorov, A. V.
dc.creatorWang, Z.
dc.creatorDing, H.
dc.date2005-01-17
dc.date.accessioned2026-07-07T06:19:15Z
dc.date.available2026-07-07T06:19:15Z
dc.descriptionWe report a systematic angle-resolved photoemission study on Na$_x$CoO$_2$ for a wide range of Na concentrations ($0.3 \leq x \leq 0.72$). In all the metallic samples at different $x$, we observed (i) only a single hole-like Fermi surface centered around $Γ$ and (ii) its area changes with $x$ according to the Luttinger theorem. We also observed a surface state that exhibits a larger Fermi surface area. The $e_g^\prime$ band and the associated small Fermi surface pockets near the $K$ points predicted by band calculations are found to ``sink'' below the Fermi energy in a manner almost independent of the doping and temperature.
dc.description4 pages, 5 figures
dc.identifierhttps://arxiv.org/abs/cond-mat/0501403
dc.identifierhttp://arxiv.org/abs/cond-mat/0501403
dc.identifierPhys. Rev. Lett. 95, 146401 (2005)
dc.identifierdoi:10.1103/PhysRevLett.95.146401
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/95010
dc.subjectStrongly Correlated Electrons
dc.titleFermi surface evolution and Luttinger theorem in Na$_x$CoO$_2$: a systematic photoemission study
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