AbstractUsing the extended Blonder--Tinkham--Klapwijk (BTK) theory, this paper calculates the tunnelling conductance in quantum wire/insulator/dx2 -y2 + idxy mixed wave superconductor ( q / I /dx2 -y2 + idxy) junctions. That is different from the case in d- and p-wave superconductor junctions. When the angle $\alpha$ between a-axis of the dx2 -y2 wave superconductor and the interface normal is $\pi$ /4, there follows a rather distinctive tunnelling conductance. The zero-bias conductance peak (ZBCP) may or may not appear in the tunnelling conductance. Both the interface potential z and the quasi-particle lifetime factor $\varGamma$ are smaller, there is no ZBCP. Otherwise, the ZBCP will appear. The position of bias conductance peak (BCP) depends strongly on the amplitude ratio of two components for dx2 -y2 + idxy mixed wave. The low and narrow ZBCP may coexist with the BCP in the tunnelling conductance. Using those features in the tunnelling conductance of q / I /dx2 -y2 + idxy junctions, it can distinguish dx2 -y2 + idxy mixed wave superconductor from d- and p-wave one.
Received: 03 February 2009
Revised: 20 March 2009
Accepted manuscript online:
Mobility limited by cluster scattering in ternary alloy quantum wires Zhang Heng (张恒), Yang Shao-Yan (杨少延), Liu Gui-Peng (刘贵鹏), Wang Jian-Xia (王建霞), Jin Dong-Dong (金东东), Li Hui-Jie (李辉杰), Liu Xiang-Lin (刘祥林), Zhu Qin-Sheng (朱勤生), Wang Zhan-Guo (王占国). Chin. Phys. B, 2014, 23(1): 017305.
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