正常金属-绝缘层-铁磁/超导结微分电导峰的Zeeman劈裂

Conductance peak with Zeeman splitting in normal metal-insulator-ferromagnet/superconductor tunnel junctions

通过求解Bogoliubov deGennes(BdG)方程 ,利用推广的Blonder Tinkham Klapwijk(BTK)理论 ,计算了考虑结界面粗糙散射情况下正常金属 绝缘层 铁磁超导结 (N I FS)的微分电导 .研究表明 ,铁磁超导态中的磁交换能Eh 能使微分电导峰产生Zeeman劈裂 ,劈裂峰的能量间隔为 2Eh,结界面势垒散射和结界面粗糙散射降低了隧道结的微分电导峰值 .

Using Bogoliubov-de Gennes equations, we obtain the self-consistent equation in a ferromagnetic superconductor. Taking into account the rough interface scattering effects, in the framework of the Blonder-Tinkham-Klapwijk model, we present the differential conductance of the normal metal-insulator-ferromagnet/superconductor (N/I/FS) tunnel junctions. It is shown that the exchange energy E-h in FS can lead to the Zeeman splitting of the conductance peaks ; the energy difference between the two splitting peaks is equal to 2E(h). The differential conductances in N/I/FS are suppressed by the barrier strength and rough interface scattering strength.