DILUTED JOSEPHSON-JUNCTION ARRAYS IN A MAGNETIC FIELD : PHASE COHERENCE AND VORTEX GLASS THRESHOLDS
DILUTED JOSEPHSON-JUNCTION ARRAYS IN A MAGNETIC FIELD : PHASE COHERENCE AND VORTEX GLASS THRESHOLDS
复制标题
磁场中的稀释约瑟夫森结阵列：相位相干性和涡旋玻璃阈值
DOI：
10.1103/physrevb.57.10314
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发表时间：
1998
影响因子：
3.7
通讯作者：
M. Gabay
中科院分区：
文献类型：
--
作者：
M. Benakli;E. Granato;S. R. Shenoy;M. Gabay
The effects of random dilution of junctions on a two-dimensional Josephson-junction array in a magnetic field are considered. For rational values of the average flux quantum per plaquette $f,$ the superconducting transition temperature vanishes, for increasing dilution at a critical value ${x}_{S}(f),$ while the vortex ordering remains stable up to ${x}_{\mathrm{VL}}g{x}_{S},$ far below the value ${x}_{p}$ corresponding to the geometric percolation threshold. For ${x}_{\mathrm{VL}}lxl{x}_{p},$ the array behaves as a zero-temperature vortex glass. Numerical results for $f=1/2$ from defect energy calculations are presented and are consistent with this scenario.
The effects of random dilution of junctions on a two-dimensional Josephson-junction array in a magnetic field are considered. For rational values of the average flux quantum per plaquette $f,$ the superconducting transition temperature vanishes, for increasing dilution at a critical value ${x}_{S}(f),$ while the vortex ordering remains stable up to ${x}_{\mathrm{VL}}g{x}_{S},$ far below the value ${x}_{p}$ corresponding to the geometric percolation threshold. For ${x}_{\mathrm{VL}}lxl{x}_{p},$ the array behaves as a zero-temperature vortex glass. Numerical results for $f=1/2$ from defect energy calculations are presented and are consistent with this scenario.