ac dynamics of a pinned flux-line lattice

被引：34

作者：

Henderson, W

Andrei, EY

Higgins, MJ

Bhattacharya, S

机构：

[1] Rutgers State Univ, Dept Phys & Astron, Piscataway, NJ 08855 USA

[2] NEC Res Inst, Princeton, NJ 08540 USA

来源：

PHYSICAL REVIEW LETTERS | 1998年 / 80卷 / 02期

关键词：

D O I：

10.1103/PhysRevLett.80.381

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The surface impedance of 2H-NbSe2 in the mixed state was measured over the frequency range 10-3000 MHz in fields up to 2 T. A crossover between pinned and viscous flux-line dynamics is observed at a pinning frequency, omega(p). The measured omega(p) is compared to that predicted by a single particle "washboard potential" model of pinning. When the flux lattice is in an ordered state, omega(p) is in good agreement with the model. However, when it is ina metastable disordered state, omega(p) is nearly two orders of magnitude larger than expected, indicating the appearance of internal degrees of freedom and glassy dynamics.

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页码：381 / 384

页数：4

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