title: Fermi surface and quasiparticle excitations of Sr2RhO4.
abstract: The electronic structure of the layered 4d transition metal oxide Sr2RhO4 is investigated by angle resolved photoemission. We find well-defined quasiparticle excitations with a highly anisotropic dispersion, suggesting a quasi-two-dimensional Fermi-liquid-like ground state. Markedly different from the isostructural Sr2RuO4, only two bands with dominant Rh 4dxz,zy character contribute to the Fermi surface. A quantitative analysis of the photoemission quasiparticle band structure is in excellent agreement with bulk data. In contrast, it is found that state-of-the-art density functional calculations in the local density approximation differ significantly from the experimental findings.
authors.affiliation: Department of Applied Physics, and Stanford Synchrotron Radiation Laboratory, Stanford University, Stanford, California 94305, USA.
authors.forename: F
authors.initials: F
authors.lastname: Baumberger
authors.forename: N J C
authors.initials: NJ
authors.lastname: Ingle
authors.forename: W
authors.initials: W
authors.lastname: Meevasana
authors.forename: K M
authors.initials: KM
authors.lastname: Shen
authors.forename: D H
authors.initials: DH
authors.lastname: Lu
authors.forename: R S
authors.initials: RS
authors.lastname: Perry
authors.forename: A P
authors.initials: AP
authors.lastname: Mackenzie
authors.forename: Z
authors.initials: Z
authors.lastname: Hussain
authors.forename: D J
authors.initials: DJ
authors.lastname: Singh
authors.forename: Z-X
authors.initials: ZX
authors.lastname: Shen