Fermi Surface and Quasiparticle Excitations of Sr₂RhO₄

Journal Article · Sun Jan 01 04:00:00 EST 2006 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.96.246402· OSTI ID:1003597

Baumberger, F. ^[1]; Ingle, N. J. C. ^[1]; Meevasana, W. ^[1]; Lu, D. H. ^[1]; Perry, R. S. ^[2]; Mackenzie, A. P. ^[2]; Hussain, Z ^[3]; Singh, David J ^[4]; Shen, Z. X. ^[1]

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1. Stanford University
2. University of St. Andrews, St. Andrews, Fife, United Kingdom
3. Lawrence Berkeley National Laboratory (LBNL)
4. ORNL

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.

• Research Organization: Oak Ridge National Laboratory (ORNL)
• Sponsoring Organization: SC USDOE - Office of Science (SC)
• DOE Contract Number: AC05-00OR22725
• OSTI ID: 1003597
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 24 Vol. 96; ISSN 1079-7114; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
APPROXIMATIONS
ELECTRONIC STRUCTURE
FERMI LEVEL
FUNCTIONALS
GROUND STATES
OXIDES
PHOTOEMISSION
TRANSITION ELEMENTS