Physica C: Superconductivity and its Applications ( IF 1.3 ) Pub Date : 2020-04-08 , DOI: 10.1016/j.physc.2020.1353630 Hong Li , Xinjian Yang
Using Blonder-Tinkham-Klapwijk (BTK) formalism we studied the transport properties in silicene-based normal/ferromagnetic p-wave superconductor (N/FpS) junctions. Our study shows that the amplitude of the normalized conductance strongly depends on the pairing symmetry in superconductor such as px, py and px+ipy-wave symmetries, the applied electric field (EZ) and the exchange field (h) in FpS. In N/FpxS-silicene junctions the zero-bias conductance peak is obtained due to the Andreev bound states. When the electric field and magnetic field are parallel, called P configuration, there is one conductance dip (CD) for the voltage with λSO the spin obit coupling term and 2l the distance between two sublattices in the buckled silicene. In the anti-parallel (AP) configuration there is one CD at for and for there are two CDs at and , respectively. A sudden transition of conductance from zero to maximum (henceforth referred to as“switching of conductance”) at occurs in both N/FpyS-silicene junction and N/Fpx+ipyS-silicene junction. In N/FpyS-silicene junction the Andreev resonant peak appears at for in the AP case, where Δ00 is the zero temperature gap of the FpS. In N/Fpx+ipyS-silicene junctions the maximum value of the conductance appears at in P junction while in AP junction at .
中文翻译:
硅基铁磁p波超导体结中的电荷传输
使用Blonder-Tinkham-Klapwijk(BTK)形式主义,我们研究了硅基正/铁磁p波超导体(N / F p S)结中的传输性质。我们的研究表明,归一化电导的幅度很大程度上取决于超导体中的配对对称性,例如p x,p y和p x + i p y波对称性,施加电场(E Z)和交换场(h)在F p S中。在N / F p x中由于Andreev键合态,获得了S-硅结的零偏置电导峰。当电场和磁场平行时,称为P配置,电压有一个电导降(CD)与λ SO自旋讣告耦合项和2升在扣住硅烯两类子晶格之间的距离。在反并行(AP)配置中,一张CD位于 对于 和为 有两张CD 和 , 分别。电导突然从零变到最大值(以下称为“电导转换”)在N / F p y S-硅结和N / F p x + ip y S-硅结中都出现。在N / F p y S-硅结中,Andreev共振峰出现在 对于 在AP的情况下,其中Δ 00是F的零温度间隙p S.于N / F p X + IP ý S-硅烯结的最大电导出现的值 在P结处,而在AP结处 。