Comparative inverse photoemission study of high-Tc superconductors

T. Takahashi, H. Ohta, K. Murata, S. Suzuki, Y. Okabe, H. Katayama-Yoshida

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

Inverse photoemission spectroscopy has been performed on LaSrCuO, YBaCuO, and BiSrCaCuO to study the electronic structure of unoccupied region. It was found that the spectrum of Bi2Sr2CaCu2O8 has a clear Fermi edge, thereby giving a direct evidence for the existence of a Fermi surface (Fermi-liquid states), while those of YBa2 Cu3O7 and La1·85Sr0·15CuO4 exhibit little intensity at the Fermi level. A remarkable and prompt reduction of the Fermi-edge intensity was observed for the La-system. The reduction and absence of the Fermi-edge structure is ascribed to the surface degradation probably due to desorption of oxygen from the surface.

Original languageEnglish
Pages (from-to)1323-1324
Number of pages2
JournalPhysica C: Superconductivity and its applications
Volume162-164
Issue numberPART 2
DOIs
Publication statusPublished - 1989 Dec

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

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