Fermi surface of Sr2RuO4 from angle resolved photoemission

A. Damascelli, K. M. Shen, D. H. Lu, N. P. Armitage, F. Ronning, D. L. Feng, C. Kim, Z. X. Shen, T. Kimura, Y. Tokura, Z. Q. Mao, Y. Maeno

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Abstract

We investigated the low-energy electronic structure of Sr2RuO4 by angle-resolved photoemission spectroscopy (ARPES) focusing, in particular, on the controversial issues of the Fermi surface (FS) topology and of the extended van Hove singularity (evHs). A detailed study of temperature and photon energy dependence demonstrates the surface-state nature of the electronic band responsible for the evHs, and may suggest the presence of ferromagnetic correlations at the surface. In addition, we detected a replica of the primary FS that indicates a √2×√2 surface reconstruction, as confirmed by LEED. In light of these findings, the FS determined by ARPES is consistent with LDA and de Haas-van Alphen (dHvA) results, and it provides additional information on the detailed shape of the α, β and γ sheets. Also, at this stage, because of the strong sensitivity of the cleaved surface, we could not find any robust signature of the crossover from 2D to 3D Fermi liquid behavior in our ARPES measurements for T<130 K.

Original languageEnglish (US)
Pages (from-to)641-646
Number of pages6
JournalJournal of Electron Spectroscopy and Related Phenomena
Volume114-116
DOIs
StatePublished - Mar 2001
Event8th International Conference on Electronic Spectroscopy and Structure (ICESS-8) - Berkeley, CA, USA
Duration: Aug 8 2000Aug 12 2000

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Radiation
  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics
  • Spectroscopy
  • Physical and Theoretical Chemistry

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    Damascelli, A., Shen, K. M., Lu, D. H., Armitage, N. P., Ronning, F., Feng, D. L., Kim, C., Shen, Z. X., Kimura, T., Tokura, Y., Mao, Z. Q., & Maeno, Y. (2001). Fermi surface of Sr2RuO4 from angle resolved photoemission. Journal of Electron Spectroscopy and Related Phenomena, 114-116, 641-646. https://doi.org/10.1016/S0368-2048(00)00356-X