| Critical Scaling of Extended Power Law I - V Isotherms near Vortex Glass Transition |
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| 作者姓名： | 胡翔 贺丽 宁振华 陈凯旋 尹澜 陆果 徐晓林 郭建栋 王福仁 李传义 尹道乐 |
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| 作者单位： | School of Physics, Peking University, Beijing 100871 |
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| 基金项目： | Supported by the National Key Basic Research Special Foundation of China under Grant No G1999064602, and the Natlonal Natural Science Foundation of China under Grant Nos 10174003, 50377040 and 90303008. |
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| 摘 要： | In view of the question about the vortex glass theory of the freezing of disordered vortex matter raised by recent experimental observations, we reinvestigate the critical scaling of high Tc superconductors. It is found that the dc current-voltage characteristic of mixed state superconductors has a general form of extended power law which is based on the Ginzburg-Landau （GL） functional in the similar way as the vortex glass theory. Isotherms simulated from this nonlinear equation fit the experimental I- V data of Strachan et al. Phys. Rev. Left. 87（2001） 067007]. The puzzling question of the derivative plot for the I - V curves and the controversy surrounding the values of critical exponents are discussed.
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| 关 键 词： | 扩展幂律I-V等温线 旋涡玻璃 跃迁 高温超导体 临界定标 |
| 收稿时间： | 2006-09-12 |
| 修稿时间： | 2006-09-12 |
Critical Scaling of Extended Power Law I - V Isotherms near Vortex Glass Transition |
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| HU Xiang,HE Li,NING Zhen-Hua,CHEN Kai-Xuan,YIN Lan,LU Guo,XU Xiao-Lin,GUO Jian-Dong,WANG Fu-Ren,LI Chuan-Yi,YIN Dao-Le.Critical Scaling of Extended Power Law I - V Isotherms near Vortex Glass Transition[J].Chinese Physics Letters,2006,23(12):3349-3351. |
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| Authors: | HU Xiang HE Li NING Zhen-Hua CHEN Kai-Xuan YIN Lan LU Guo XU Xiao-Lin GUO Jian-Dong WANG Fu-Ren LI Chuan-Yi YIN Dao-Le |
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| Institution: | School of Physics, Peking University, Beifing 100871 |
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| Abstract: | In view of the question about the vortex glass theory of the freezing of disordered vortex matter raised by recent experimental observations, we reinvestigate the critical scaling of high Tc superconductors. It is found that the dc current-voltage characteristic of mixed state superconductors has a general form of extended power law which is based on the Ginzburg--Landau (GL) functional in the similar way as the vortex glass theory. Isotherms simulated from this nonlinear equation fit the experimental I-V data of Strachan et al. Phys. Rev. Lett. 87 (2001) 067007]. The puzzling question of the derivative plot for the I-V curves and the controversy surrounding the values of critical exponents are discussed. |
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| Keywords: | 74 25 Sv 74 25 Fy 74 25 Ha 74 20 De |
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