Fermi surface, surface states, and surface reconstruction in Sr2RuO4
The electronic structure of Sr2RuO4 is investigated by high angular resolution ARPES at several incident photon energies. We address the controversial issues of the Fermi surface (FS) topology and the van Hove singularity at the M point, showing that a surface state and the replica of the primary FS due to sqrt[2]xsqrt[2] surface reconstruction are responsible for previous conflicting interpretations. The FS thus determined by ARPES is consistent with the de Haas-van Alphen results, and it provides additional information on the detailed shape of the alpha, beta, and gamma sheets.
Damascelli
A
Department of Physics, Applied Physics and Stanford Synchrotron Radiation Laboratory, Stanford University, Stanford, California 94305, USA.
Lu
DH
Shen
KM
Armitage
NP
Ronning
F
Feng
DL
Kim
C
Shen
ZX
Kimura
T
Tokura
Y
Mao
ZQ
Maeno
Y