扩展幂律型脱钉和高温超导体及MgB_2的电阻转变

HU XIANG,YU ZENG-QIANG,NING ZHEN-HUA,YIN LAN,XU XIAO-LIN,GUO JIAN-DONG,WANG FU-REN,YIN DAO-LE

Chinese Journal of Low Temperature Physics（2005）

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Abstract

近来,关于无序涡旋物质凝聚体的著名的涡旋玻璃理论受到了来自某些新实验的严重质疑.我们重新审查了高温超导体的临界标度,发现超导混合态的直流伏安特性具有扩展幂律的一般形式.由该扩展幂律型非线性方程模拟的等温线和Strachan等人得到的实验数据[Phys.Rev.Lett.87(2001),067007]符合得很好.文中还讨论了长期以来围绕纵向电阻率和霍尔电阻率的临界指数的某些争议.

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Key words

resistivity transition,extended power law,Hall resistivity,vortex glass

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