Scaling of the Hall resistivity in the solid and liquid vortex phases in twinned single-crystal YBa2Cu3O7-δ

被引:31
作者
D'Anna, G [1 ]
Berseth, V
Forró, L
Erb, A
Walker, E
机构
[1] Ecole Polytech Fed Lausanne, Inst Genie Atom, CH-1015 Lausanne, Switzerland
[2] Univ Geneva, Dept Phys Mat Condensee, CH-1211 Geneva, Switzerland
来源
PHYSICAL REVIEW B | 2000年 / 61卷 / 06期
关键词
D O I
10.1103/PhysRevB.61.4215
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Longitudinal and Hall voltages are measured in a clean twinned YBa2Cu3O7-delta single crystal in the liquid and solid vortex phases. For magnetic fields tilted away from the c axis more than about 2 degrees, a scaling law \rho(xy)\ = Ap(xx)(beta) with beta approximate to 1.4 is observed, which is unaffected by the vortex-lattice melting transition. The vortex-solid Hall conductivity is nonlinear and diverges to negative values at low temperature. When the magnetic field is aligned to the c axis, the twin-boundary correlated disorder modifies the scaling law, and beta approximate to 2. The scaling law is unaffected by the Bose-glass transition. We discuss the scaling behavior in terms of a dimension-dependent percolation theory. The twin-boundary guided vortex motion is also investigated.
引用
收藏
页码:4215 / 4221
页数:7
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