ARPES on Na$_{0.6}$CoO$_{2}$: Fermi surface, extended flat dispersion, and unusual band splitting

Simple item page
dc.creatorYang, H. -B.
dc.creatorWang, S. -C.
dc.creatorSekharan, A. K. P.
dc.creatorMatsui, H.
dc.creatorSouma, S.
dc.creatorSato, T.
dc.creatorTakahashi, T.
dc.creatorTakeuchi, T.
dc.creatorCampuzano, J. C.
dc.creatorJin, R.
dc.creatorSales, B. C.
dc.creatorMandrus, D.
dc.creatorWang, Z.
dc.creatorDing, H.
dc.date2003-10-22
dc.date.accessioned2026-07-07T02:54:21Z
dc.date.available2026-07-07T02:54:21Z
dc.descriptionThe electronic structure of single crystals Na$_{0.6}$CoO$_2$, which are closely related to the superconducting Na$_{0.3}$CoO$_2$.$y$H$_2$O ($T_c \sim 5K$), is studied by angle-resolved photoelectron spectroscopy. While the measured Fermi surface is found to be consistent with the prediction of a local density band theory, the energy dispersion is highly renormalized, with an anisotropy along the two principle axes ($Γ$-$K$, $Γ$-$M$). Our ARPES result also indicates that an extended flat band is formed slightly above $E_F$ along $Γ$-$K$. In addition, an unusual band splitting is observed in the vicinity of the Fermi surface along the $Γ$-$M$ direction, which differs from the predicted bilayer splitting.
dc.description4 figures
dc.identifierhttps://arxiv.org/abs/cond-mat/0310532
dc.identifierhttp://arxiv.org/abs/cond-mat/0310532
dc.identifierPhys. Rev. Lett. 92, 246403 (2004)
dc.identifierdoi:10.1103/PhysRevLett.92.246403
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/22514
dc.subjectSuperconductivity
dc.subjectStrongly Correlated Electrons
dc.titleARPES on Na$_{0.6}$CoO$_{2}$: Fermi surface, extended flat dispersion, and unusual band splitting
dc.typetext

Files

Collections

arXiv