The tunneling magnetoresistance in 2D topological superconductor hybrid structure.

Based on the Green's function method and tight-binding model, we have investigated tunneling magnetoresistance (TMR) in a two-dimensional quantum anomalous Hall insulator (QAHI)/topological superconductor (TSC)/QAHI hybrid structure with its Chern number N = 1 and N = 0 in the central TSC region. It is found that the TMR effect can emerge in our proposed structure. In the presence of the chiral gapless Majorana edge state, the 100% TMR ratio is robust to disorder and is independent of the length of TSC. Further calculations show that the TMR effect could be adjusted by the relative angle between magnetizations of left and right QAHI electrodes and magnetization strength. In addition, we also calculate the TMR effect in the QAHI/TSC/QAHI hybrid structure with its Chern number N = 2 in the central TSC region. We found that our conclusions are still applicable. [ABSTRACT FROM AUTHOR]