Kinetic roughening of magnetic flux fronts in Bi2Sr2CaCu2O8+δ crystals with columnar defects

被引：3
作者：
Barness, D. [1 ,2 ]
Efraim, Y.
Taitelbaum, H. [1 ]
Sinvani, M. [1 ,2 ]
Shaulov, A. [1 ,2 ]
Yeshurun, Y. [1 ,2 ]
机构：
[1] Bar Ilan Univ, Dept Phys, Inst Superconduct, IL-52900 Ramat Gan, Israel
[2] Bar Ilan Univ, Ctr Nanotechnol, IL-52900 Ramat Gan, Israel
来源：
PHYSICAL REVIEW B | 2012年 / 85卷 / 17期
基金：
以色列科学基金会;
关键词：
HIGH-TEMPERATURE SUPERCONDUCTORS; SELF-ORGANIZED CRITICALITY; TRANSIENT VORTEX STATES; DISORDERED MEDIA; CORRELATED DISORDER; BOSON LOCALIZATION; SLOW COMBUSTION; MGB2; FILMS; THIN-FILMS; AVALANCHES;
D O I：
10.1103/PhysRevB.85.174516
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Kinetic roughening analysis is utilized to investigate fingerlike flux-front patterns observed in a Bi2Sr2CaCu2O8+delta single crystal incorporating columnar defects. At small-length scales, scaling exponents consistent with the Kardar-Parisi-Zhang (KPZ) model for a moving front in quenched noise (QKPZ) are found. A crossover to scaling exponents of a KPZ system, dominated by temporal noise, can be identified at a large-length scale, which increases with temperature. The induction-temperature range for which the QKPZ behavior is observed is linked to the accommodation line characterizing the crossover between dominating vortex-defects and vortex-vortex interaction regimes.
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页数：5
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