发帖
雷达卡
摘要翻译：
我们在相位表象中使用驱动的蒙特卡罗动力学来确定二维约瑟夫森结阵列在无理通量量子下的线性电阻率和电流-电压标度。结果与临界温度消失的相相干跃迁情形相一致。线性电阻率在任何有限温度下都不为零，但在由热临界指数决定的与温度相关的交叉电流下，非线性行为开始出现。通过动态标度分析，我们确定了这个临界指数和线性电阻率的热激活行为。结果与先前使用电阻分路结模型计算阵列动力学的结果一致。线性电阻率行为与超导晶粒阵列上的一些实验结果一致，但与线状网络上的实验结果不一致，我们认为线状网络是在交叉电流以上的电流区获得的。
---
英文标题：
《Zero-temperature resistive transition in Josephson-junction arrays at
irrational frustration》
---
作者：
Enzo Granato
---
最新提交年份：
2007
---
分类信息：
一级分类：Physics 物理学
二级分类：Superconductivity 超导电性
分类描述：Superconductivity: theory, models, experiment. Superflow in helium
超导：理论，模型，实验。氦中超流
--
一级分类：Physics 物理学
二级分类：Statistical Mechanics 统计力学
分类描述：Phase transitions, thermodynamics, field theory, non-equilibrium phenomena, renormalization group and scaling, integrable models, turbulence
相变，热力学，场论，非平衡现象，重整化群和标度，可积模型，湍流
--
---
英文摘要：
We use a driven Monte Carlo dynamics in the phase representation to determine the linear resistivity and current-voltage scaling of a two-dimensional Josephson-junction array at an irrational flux quantum per plaquette. The results are consistent with a phase-coherence transition scenario where the critical temperature vanishes. The linear resistivity is nonzero at any finite temperatures but nonlinear behavior sets in at a temperature-dependent crossover current determined by the thermal critical exponent. From a dynamic scaling analysis we determine this critical exponent and the thermally activated behavior of the linear resistivity. The results are in agreement with earlier calculations using the resistively shunted-junction model for the dynamics of the array. The linear resistivity behavior is consistent with some experimental results on arrays of superconducting grains but not on wire networks, which we argue have been obtained in a current regime above the crossover current.
---
PDF链接：
https://arxiv.org/pdf/704.1097
京公网安备 11010802022788号
