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Fermi-Liquid Versus Pseudogap Behaviors in Filling-Control Transition-Metal Oxides

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Physics and Chemistry of Transition Metal Oxides

Part of the book series: Springer Series in Solid-State Sciences ((SSSOL,volume 125))

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Abstract

Comparative photoemission studies of Lai1− x Sr x TiO3+y/2 (LSTO) and La2−x Sr x CuO4 (LSCO) have revealed contrasting behaviors in their low-energy electronic properties as the system approaches a filling-control Mott transition from the metallic side. In LSTO and overdoped LSCO, the chemical potential shift, the spectral density of states at the chemical potentialμ and the quasi-particle density atμ can be consistently analyzed within Fermi-liquid theory. In underdoped LSCO, on the other hand, the Fermi-liquid picture breaks down and a relatively wide (~100 meV) pseudogap is opened atμ in the density of states, in addition to a smaller leading-edge shift of ~ 10 meV aroundk ~ (π, 0) in angle-resolved photoemission spectra. The two energy scales increase with decreasing hole concentration x. The larger energy scale is probably associated with antiferromagnetic short-range order while the smaller one is attributed to the spin-gap formation or superconducting fluctuations.

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Authors and Affiliations

  1. Department of Physics, University of Tokyo, Bunkyo-ku, Tokyo, 113-0033, Japan

    A. Fujimori, T. Yoshida, A. Ino & T. Mizokawa

  2. Department of Applied Physics and Stanford Synchrotron Radiation Laboratory, Stanford University, Stanford, CA, 94305, USA

    C. Kim & Z.-X. Shen

  3. Department of Applied Physics, University of Tokyo, Bunkyo-ku, Tokyo, 113-0033, Japan

    Y. Taguchi, T. Katsufuji & Y. Tokura

  4. Department of Superconductivity, University of Tokyo, Bunkyo-ku, Tokyo, 113- 8656, Japan

    H. Eisaki, S. Uchida & K. Kishio

Authors
  1. A. Fujimori
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  2. T. Yoshida
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  3. A. Ino
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  4. T. Mizokawa
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  5. C. Kim
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  6. Z.-X. Shen
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  7. Y. Taguchi
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  8. T. Katsufuji
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  9. Y. Tokura
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  10. H. Eisaki
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  11. S. Uchida
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  12. K. Kishio
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Editor information

Editors and Affiliations

  1. Department of Physics, The University of Tokyo, Tokyo, 113, Japan

    Hidetoshi Fukuyama

  2. Department of Applied Physics, The University of Tokyo, Tokyo, 113, Japan

    Naoto Nagaosa

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© 1999 Springer-Verlag Berlin Heidelberg

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Fujimori, A. et al. (1999). Fermi-Liquid Versus Pseudogap Behaviors in Filling-Control Transition-Metal Oxides. In: Fukuyama, H., Nagaosa, N. (eds) Physics and Chemistry of Transition Metal Oxides. Springer Series in Solid-State Sciences, vol 125. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-60041-8_10

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  • DOI: https://doi.org/10.1007/978-3-642-60041-8_10

  • Publisher Name: Springer, Berlin, Heidelberg

  • Print ISBN: 978-3-642-64231-9

  • Online ISBN: 978-3-642-60041-8

  • eBook Packages: Springer Book Archive

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