Fermi surface sheet-dependent superconductivity in 2H-NbSe2

T. Yokoya, T. Kiss, A. Chainani, S. Shin, M. Nohara, H. Takagi

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Abstract

High-resolution angle-resolved photoemission spectroscopy was used to study the superconducting energy gap and changes in the spectral function across the superconducting transition in the quasi-two-dimensional superconductor 2H-NbSe2. The momentum dependence of the superconducting gap was determined on different Fermi surface sheets. The results indicate Fermi surface sheet-dependent superconductivity in this low-transition temperature multiband system and provide a description consistent with thermodynamic measurements and the anomalous de Haas-van Alphen oscillations observed in the superconducting phase. The present data suggest the importance of Fermi surface sheet-dependent superconductivity in explaining exotic superconductivity in other multiband systems with complex Fermi surface topology, such as the borides and f-electron superconductors.

Original languageEnglish
Pages (from-to)2518-2520
Number of pages3
JournalScience
Volume294
Issue number5551
DOIs
Publication statusPublished - Dec 21 2001
Externally publishedYes

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ASJC Scopus subject areas

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