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首页> 外文期刊>Physica, C. Superconductivity and its applications >Josephson plasma resonance in solid and glass phases of Bi2Sr2CaCu2O8+delta
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Josephson plasma resonance in solid and glass phases of Bi2Sr2CaCu2O8+delta

机译：Bi2Sr2CaCu2O8 +δ的固相和玻璃相中的约瑟夫森等离子体共振

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摘要

Vortex matter phases and phase transitions, are investigated by means of Josephson plasma resonance in under-doped Bi2Sr2CaCu2O8+delta single crystals in a microwave frequency range between 19 and 70 GHz. Accompanied by the vortex lattice melting transition, a jump of the interlayer phase coherence extracted from the field dependence of the plasma frequency was observed. In the solid phase, the interlayer coherence little depends on field at a temperature region well below T-c while it gradually decreases as field increases toward the melting line up to just below T-c. As a result, the magnitude of the jump decreases with increasing temperature and is gradually lost in the vicinity of T-c. This indicates that the vortex lines formed in the vortex solid phase are thermally meandering and the phase transition becomes weak especially just below T-c. (C) 2001 Elsevier Science B.V. All rights reserved. [References: 15]
机译：利用约瑟夫森等离子体共振在19至70 GHz微波频率范围内的掺杂不足的Bi2Sr2CaCu2O8 +δ单晶中研究了涡旋物质相和相变。伴随着旋涡晶格熔化转变，观察到从等离子体频率的场依赖性提取的层间相干的跳跃。在固相中，层间相干性几乎不依赖于温度远低于T-c的场，而随着场向熔解线增加直至恰好低于T-c而逐渐减小。结果，跳跃的幅度随着温度的升高而减小，并且在T-c附近逐渐消失。这表明在涡旋固相中形成的涡旋线是热曲折的，并且相变变弱，特别是在T-c以下。 （C）2001 Elsevier Science B.V.保留所有权利。 [参考：15]

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