Josephson plasma resonance in κ-(BEDT-TTF)2Cu(NCS)2

被引：22
|
作者：
Mola, MM [1 ]
King, JT
McRaven, CP
Hill, S
Qualls, JS
Brooks, JS
机构：
[1] Montana State Univ, Dept Phys, Bozeman, MT 59717 USA
[2] Florida State Univ, Dept Phys, Tallahassee, FL 32310 USA
[3] Florida State Univ, Natl High Magnet Field Lab, Tallahassee, FL 32310 USA
来源：
PHYSICAL REVIEW B | 2000年 / 62卷 / 09期
基金：
美国国家科学基金会;
关键词：
D O I：
10.1103/PhysRevB.62.5965
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A cavity perturbation technique is used to study the microwave response of the organic superconductor kappa-(BEDT-TTF)(2)Cu(NCS)(2). Observation of a Josephson plasma resonance, below T-c (similar to 10 K), enables investigation of the vortex structure within the mixed state of this highly anisotropic, type-II superconductor. Contrary to previous assumptions, frequency-dependent studies (28-153 GHz) indicate that the squared plasma frequency (omega(p)(2)) depends exponentially on the magnetic-field strength. Such behavior has been predicted for a weakly pinned quasi-two-dimensional vortex lattice [Bulaevskii et al., Phys. Rev. Lett. 74, 801 (1995)]. Our data also suggests a transition in the vortex structure near the irreversibility Line.
引用
收藏
页码：5965 / 5970
页数：6
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