Fermi surface and quasiparticle excitations of Sr$_{2}$RhO$_{4}$

Details Fermi surface and quasiparticle excitations of Sr$_{2}$RhO$_{4}$ Fermi surface and quasiparticle excitations of Sr$_{2}$RhO$_{4}$

2006-04-18

arxiv.org/abs/cond-mat/0604421v1

Phys. Rev. Lett. 96, 246402 (2006)

Physics

Condensed Matter

Strongly Correlated Electrons

Scientific paper

10.1103/PhysRevLett.96.246402

The electronic structure of the layered 4$d$ transition metal oxide Sr$_{2}$RhO$_{4}$ 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 Sr$_{2}$RuO$_{4}$, only two bands with dominant Rh 4$d_{xz,zy}$ 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.

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