期刊
SCIENCE
卷 294, 期 5551, 页码 2518-2520出版社
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.1065068
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High-resolution angle-resolved photoemission spectroscopy was used to study the superconducting energy gap and changes in the spectra[ 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.
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