SELF-ORGANIZED CRITICAL-BEHAVIOR IN PINNED FLUX LATTICES

被引:104
作者
PLA, O [1 ]
NORI, F [1 ]
机构
[1] UNIV AUTONOMA MADRID, CSIC, INST CIENCIAS MAT, E-28049 MADRID, SPAIN
关键词
D O I
10.1103/PhysRevLett.67.919
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
We study the response of pinned flux lattices, under small perturbations in the driving force, below and close to the pinning-depinning transition. For driving Lorentz forces below F(c) (the depinning force at which the whole flux lattice slides), the system has instabilities against small force increases, with a power-law distribution characteristic of self-organized criticality. Specifically, D(d) approximately d-1.3, where d is the displacement of a flux line after a very small force increase. We also study the initial stages of the motion of the lattice once the driving force overcomes the pinning forces.
引用
收藏
页码:919 / 922
页数:4
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