Fermi surfaces, electron-hole asymmetry, and correlation kink in a three-dimensional Fermi liquid LaNiO3

R. Eguchi, A. Chainani, M. Taguchi, M. Matsunami, Y. Ishida, K. Horiba, Y. Senba, H. Ohashi, and S. Shin
Phys. Rev. B 79, 115122 – Published 23 March 2009

Abstract

We report the three-dimensional (3D) momentum-resolved soft x-ray photoemission spectroscopy of the Fermi liquid LaNiO3. The out-of-plane and in-plane cuts of the 3D electron- and hole-Fermi surfaces (FSs) are observed by energy- and angle-dependent photoemission measurements. The energy bands forming the electron FS suggest an ω2 dependence of the imaginary part of the self-energy and a “correlation kink” at an energy scale of 0.25 eV. In contrast, the bands which form nesting character hole FSs do not show kinks and match local-density approximation calculations. The results indicate a momentum-dependent mass renormalization, leading to electron-hole asymmetry in strongly correlated LaNiO3.

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  • Received 10 December 2008

DOI:https://doi.org/10.1103/PhysRevB.79.115122

©2009 American Physical Society

Authors & Affiliations

R. Eguchi1,2,*, A. Chainani1, M. Taguchi1, M. Matsunami1, Y. Ishida1, K. Horiba1, Y. Senba3, H. Ohashi3, and S. Shin1,2

  • 1RIKEN SPring-8 Center, Sayo-cho, Sayo-gun, Hyogo 679-5148, Japan
  • 2Institute for Solid State Physics, University of Tokyo, Kashiwanoha, Kashiwa, Chiba 277-8581, Japan
  • 3JASRI/SPring-8, Sayo-cho, Sayo-gun, Hyogo 679-5198, Japan

  • *ritsuko@spring8.or.jp

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Vol. 79, Iss. 11 — 15 March 2009

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