Superconducting electronic state in optimally doped YBa2Cu3O7-d observed with laser-excited angle-resolved photoemission spectroscopy

Simple item page
dc.creatorOkawa, M.
dc.creatorIshizaka, K.
dc.creatorUchiyama, H.
dc.creatorTadatomo, H.
dc.creatorMasui, T.
dc.creatorTajima, S.
dc.creatorWang, X. -Y.
dc.creatorChen, C. -T.
dc.creatorWatanabe, S.
dc.creatorChainani, A.
dc.creatorSaitoh, T.
dc.creatorShin, S.
dc.date2008-11-04
dc.date2009-03-19
dc.date.accessioned2026-07-07T13:10:19Z
dc.date.available2026-07-07T13:10:19Z
dc.descriptionLow energy electronic structure of optimally doped YBa2Cu3O7-d is investigated using laser-excited angle-resolved photoemission spectroscopy. The surface state and the CuO chain band that usually overlap the CuO2 plane derived bands are not detected, thus enabling a clear observation of the bulk superconducting state. The observed bilayer splitting of the Fermi surface is ~0.08 angstrom^{-1} along the (0,0)-(pi,pi) direction, significantly larger than Bi2Sr2CaCu2O8+d. The kink structure of the band dispersion reflecting the renormalization effect at ~60 meV shows up similarly as in other hole-doped cuprates. The momentum-dependence of the superconducting gap shows d_{x^2-y^2}-wave like amplitude, but exhibits a nonzero minimum of ~12 meV along the (0,0)-(pi,pi) direction. Possible origins of such an unexpected "nodeless" gap behavior are discussed.
dc.description9 pages, 10 figures; revised version accepted for publication in Phys. Rev. B
dc.identifierhttps://arxiv.org/abs/0811.0479
dc.identifierhttp://arxiv.org/abs/0811.0479
dc.identifierPhys. Rev. B 79, 144528 (2009)
dc.identifierdoi:10.1103/PhysRevB.79.144528
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/228984
dc.subjectSuperconductivity
dc.subjectStrongly Correlated Electrons
dc.titleSuperconducting electronic state in optimally doped YBa2Cu3O7-d observed with laser-excited angle-resolved photoemission spectroscopy
dc.typetext

Files

Collections

arXiv