Direct observation of the mass renormalization in SrVO$_3$ by angle resolved photoemission spectroscopy

ORAL

Abstract

We have performed an angle-resolved photoemission study of the perovskite-type SrVO$_{3}$. Observed spectral weight distribution in the momentum space shows cylindrical Fermi surfaces consisting of the $d_{xy}$ orbitals as predicted by local-density-approximation (LDA) band-structure calculation. The observed energy dispersion shows a moderately enhanced effective mass near the Fermi level compared to the LDA results, corresponding to the effective mass enhancement seen in the thermodynamic properties. Surface effects on the spectra are also discussed.

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Authors

  • Teppei Yoshida

    Univ. of Tokyo

  • Kiyohisa Tanaka

  • Hajime Yagi

    University of Tokyo

  • Akihiro Ino

    Hiroshima University

  • Hiroshi Eisaki

    National Institute of Advanced Industrial Science and Technology, Japan, AIST, Japan, AIST

  • Atsushi Fujimori

    Univ. of Tokyo, University of Tokyo

  • Zhi-Xun Shen

    Department of Physics, Applied Physics and Stanford Synchrotron Radiation Laboratory, Stanford University, Stanford Univ., Department of Physics, Department of Applied Physics and Stanford Synchrotron Radiation Laboratory, Stanford University, Stanford, CA 94305, Departments of Physics, Applied Physics and Stanford Synchrotron Radiation Laboratory, Stanford University