半导体/磁性d波超导隧道结中的散粒噪声  

Shot noise in the semiconductor/ferromagnetic d-wave superconductor tunnel junction

作　　者：梁志鹏[1,2] 董正超[2] 

机构地区：[1]苏州大学物理科学与技术学院,苏州215006 [2]淮阴师范学院物理系,淮安223001

出　　处：《物理学报》2010年第2期1288-1293,共6页Acta Physica Sinica

摘　　要：考虑到磁性d波超导体中的能隙与磁交换能的依赖关系,通过求解Bogoliubov-de Gennes(BdG)方程,利用Blonder-Tinkham-Klapwijk理论方法研究半导体/磁性d波超导隧道结中的散粒噪声.计算结果表明:磁性d波超导结中的磁交换能h0可导致散粒噪声在零偏压处的双峰和能隙处的峰出现劈裂,劈裂的宽度为2h0;磁交换能h0同时对散粒噪声及噪声功率与平均电流的比值有抑制作用.Considering the dependence of the gap on the exchange energy in ferromagnetic d-wave superconductor, we use an extended Blonder-Tinkham-Klapwijk approach to investigate the shot noise in semiconductor/ferromagnetic d-wave superconductor junction by solving the Bogoliubov-de Gennes（BdG） equation. It is shown that the exchange energy h0 in the ferromagnetic d-wave superconductor may induce a split of the shot noise double-peak at zero-bias and the energy gap peak, and the interval between the two split peaks is equal to 2h0; furthermore, with the increasing exchange energy h0, the shot noise and the ratio of shot noise power to average current are restrained.

关 键 词：磁性d波超导体 半导体 散粒噪声 

分 类 号：O472.5[理学—半导体物理]