Comparative inverse photoemission study of high-Tc superconductors

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

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3 Citations (Scopus)


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
Issue numberPART 2
Publication statusPublished - 1989 Dec


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