標題: | Theory of the vortex matter transformations in high-T-c superconductor YBCO |
作者: | Li, DP Rosenstein, B 交大名義發表 電子物理學系 National Chiao Tung University Department of Electrophysics |
公開日期: | 25-四月-2003 |
摘要: | Flux line lattice in type II superconductors undergoes a transition into a "disordered" phase such as vortex liquid or vortex glass, due to thermal fluctuations and random quenched disorder. We quantitatively describe the competition between the thermal fluctuations and the disorder using the Ginzburg-Landau approach. The following T-H phase diagram of YBCO emerges. There are just two distinct thermodynamical phases, the homogeneous and the crystalline one, separated by a single first order transition line. The line, however, makes a wiggle near the experimentally claimed critical point at 12 T. The "critical point" is reinterpreted as a (noncritical) Kauzmann point in which the latent heat vanishes and the line is parallel to the T axis. The magnetization, the entropy, and the specific heat discontinuities at melting compare well with experiments. |
URI: | http://dx.doi.org/10.1103/PhysRevLett.90.167004 http://hdl.handle.net/11536/27951 |
ISSN: | 0031-9007 |
DOI: | 10.1103/PhysRevLett.90.167004 |
期刊: | PHYSICAL REVIEW LETTERS |
Volume: | 90 |
Issue: | 16 |
起始頁: | 0 |
結束頁: | 0 |
顯示於類別: | 期刊論文 |