Interlayer magnetoresistance in the organic superconductor κ-(BEDT-TTF) 2 Cu[N(CN) 2 ]Br near the superconducting transition
Interlayer magnetoresistance in the organic superconductor κ-(BEDT-TTF) 2 Cu[N(CN) 2 ]Br near the superconducting transition
复制标题
有机超导体κ-(BEDT-TTF) 2 Cu[N(CN) 2 ]Br超导转变附近的层间磁阻
DOI：
10.1103/physrevb.60.574
复制
发表时间：
1999
影响因子：
3.7
通讯作者：
Jack M. Williams
中科院分区：
文献类型：
--
作者：
F. Zuo;J. Schlueter;Jack M. Williams
本文报道了有机超导体{kappa}-（BEDT-TTF）{sub 2}Cu[N（CN）{sub 2}]Br在平行和垂直于电流方向的场作用下的层间磁电阻输运测量。对于H{parallel}J，等温磁电阻R（H）随磁场的变化呈现峰值效应。在小磁场下的磁电阻可以用叠层约瑟夫森结模型来拟合，而负磁电阻则不符合具有简单平均场隙的准粒子隧穿模型。峰值效应的起源仍然没有得到解决。对于H{垂直}J，R（H）随磁场的增加而单调增加. H{垂直}J的大磁电阻与有机化合物的层状结构一致。{版权} {美国物理学会}
In this paper, we report transport measurements of interlayer magnetoresistance with field parallel and perpendicular to the current direction in the organic superconductor {kappa}-(BEDT-TTF){sub 2}Cu[N(CN){sub 2}]Br. For H{parallel}J, the isothermal magnetoresistance R(H) displays a peak effect as a function of field. While the magnetoresistance at small field can be fitted to stacked Josephson junction model, the negative magnetoresistance is not consistent with quasiparticle tunneling model with a simple mean field gap. The origin for the peak effect remains unresolved. For H{perpendicular}J, R(H) increases monotonically with increasing field. Large magnetoresistance for H{perpendicular}J is consistent with the layered structure of the organic compounds. {copyright} {ital 1999} {ital The American Physical Society}