MECHANISM OF THE LORENTZ-FORCE-INDEPENDENT DISSIPATION IN BI2SR2CACU2OY

被引:37
作者
ANDO, Y
MOTOHIRA, N
KITAZAWA, K
TAKEYA, JI
AKITA, S
机构
[1] UNIV TOKYO, DEPT IND CHEM, BUNKYO KU, TOKYO 113, JAPAN
[2] ELECT POWER IND, CENT RES INST, KOMAE, TOKYO 201, JAPAN
关键词
D O I
10.1103/PhysRevLett.67.2737
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
A novel power law was found above 65 K in the I-V characteristics of Bi2Sr2CaCu2Oy single crystals with the magnetic field perpendicular to the c axis. At 80 K, the power-law exponent decreased sharply up to 1.5 T but remained nearly constant above it, suggesting an abrupt crossover to a different mechanism. An unusual field dependence of resistivity was also found, which cannot be explained by simple flux-flow theory. The above novel features of the Lorentz-force-independent dissipation can be consistently explained by a model based on two-dimensional vortex-antivortex pair breaking.
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页码:2737 / 2740
页数:4
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