DE HAAS-VAN-ALPHEN OSCILLATIONS IN A SUPERCONDUCTING STATE AT HIGH MAGNETIC-FIELDS

被引:64
作者
DUKAN, S
TESANOVIC, Z
机构
[1] Department of Physics and Astronomy, Johns Hopkins University, Baltimore
关键词
D O I
10.1103/PhysRevLett.74.2311
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
Low-temperature quantum oscillations of the de Haas van Alphen (dHvA) amplitude are shown to persist far below the upper critical field of a strongly type-II superconductor, due to the gapless nature of the BCS quasiparticle spectrum in high fields. The dHvA amplitude in the superconducting state is smaller than its normal state counterpart by the factor [max(T,)/]2, where is the damping. This factor reflects the presence of a small gapless portion of the Fermi surface, surrounded by regions where the BCS gap is large. The agreement with recent experimental data on V3Si is very good. © 1995 The American Physical Society.
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页码:2311 / 2314
页数:4
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