QUANTUM OSCILLATIONS IN THE MIXED-STATE OF THE TYPE-II SUPERCONDUCTOR 2H-NBSE2

被引:116
作者
CORCORAN, R
MEESON, P
ONUKI, Y
PROBST, PA
SPRINGFORD, M
TAKITA, K
HARIMA, H
GUO, GY
GYORFFY, BL
机构
[1] UNIV OSAKA PREFECTURE,COLL INTEGRATED ARTS & SCI,SAKAI,OSAKA 593,JAPAN
[2] UNIV TSUKUBA,INST MAT SCI,TSUKUBA,IBARAKI 305,JAPAN
[3] SERC,DARESBURY LAB,WARRINGTON WA4 4AD,CHESHIRE,ENGLAND
关键词
D O I
10.1088/0953-8984/6/24/010
中图分类号
O469 [凝聚态物理学];
学科分类号
070205 ;
摘要
Quantum oscillations have been investigated far into the mixed state of the type II superconductor 2H-NbSe2. The de Haas-van Alphen effect is found to persist to fields as low as approximately 0.3B(C2) and to temperatures of approximately 0.003T(C). A self-consistent band structure calculation, performed for 2H-NbSe2 in the normal non-charge-density-wave state using a full potential linearized augmented plane wave (FLAPW) method, accounts well for the experimental angular dependence of the quantum oscillations in terms of a small flat hole Fermi surface around the GAMMA point. This feature derives mainly from chalcogen p bands and has a mass-enhancement factor much smaller than expected from the specific heat. Quantum oscillations in the presence of the vortex lattice are observed to experience an additional damping, from which the order parameter is estimated to be DELTA(0) = 0.6 +/- 0.1 meV.
引用
收藏
页码:4479 / 4492
页数:14
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