Fermi surface topology of Ca_{1.5}Sr_{0.5}RuO_{4} determined by ARPES

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dc.creatorWang, S. -C.
dc.creatorYang, H. -B.
dc.creatorSekharan, A. K. P.
dc.creatorSouma, S.
dc.creatorMatsui, H.
dc.creatorSato, T.
dc.creatorTakahashi, T.
dc.creatorLu, Chenxi
dc.creatorZhang, Jiandi
dc.creatorJin, R.
dc.creatorMandrus, D.
dc.creatorPlummer, E. W.
dc.creatorWang, Z.
dc.creatorDing, H.
dc.date2004-07-01
dc.date.accessioned2026-07-07T02:58:58Z
dc.date.available2026-07-07T02:58:58Z
dc.descriptionWe report ARPES results of the Fermi surface of Ca_{1.5}Sr_{0.5}RuO$_{4}, which is at the boundary of magnetic/orbital instability in the phase diagram of the Ca-substituted Sr ruthenates. Three t_{2g} energy bands and the corresponding Fermi surface sheets are observed, which are also present in the Ca-free Sr_{2}RuO$_{4}. We find that while the Fermi surface topology of the alpha, beta (d_{yz, zx}) sheets remains almost the same in these two materials, the gamma (d_{xy}) sheet exhibits a hole-like Fermi surface in Ca_{1.5}Sr_{0.5}RuO_{4} in contrast to being electron-like in Sr_{2}RuO_{4}. Our observation of all three volume conserving Fermi surface sheets clearly demonstrates the absence of orbital-selective Mott transition, which was proposed theoretically to explain the unusual transport and magnetic properties in Ca_{1.5}Sr_{0.5}RuO_{4}.
dc.identifierhttps://arxiv.org/abs/cond-mat/0407040
dc.identifierhttp://arxiv.org/abs/cond-mat/0407040
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/24330
dc.subjectStrongly Correlated Electrons
dc.titleFermi surface topology of Ca_{1.5}Sr_{0.5}RuO_{4} determined by ARPES
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