Tunneling conductance in quantum wire/insulator/dx12-y2+idxy mixed wave superconductor junctions

• 来源期刊: 中国物理B（英文版）
• 关键词: quantum wire dx2-y2+idxy mixed wave superconductor tunneling conductance quasi-particle lifetime
• 年，卷（期）: 2009,（10）
• 页码范围: 4479-4485
• 页数: 7页
• 语种: 英文

摘要

Using the extended Blonder-Tinkham-Klapwijk(BTK)theory,this paper calculates the tunnelling conductancein quantum wire/insulator/dx2-y2+idzy mixed wave superconductor(q/I/dx2-y2+idxy)junctions That is differentfrom the case in d-and p-wave superconductor junctions.When the angle α between a-axis of the dx2-y2 wavesuperconductor and the interface normal is π/4,there follows a rather distinctive tunnelling conductance.The zero-biasconductance peak(ZBCP)may or may not appear in the tunnelling conductance.Both the interface potential Z andthe quasi-particle lifetime factor [F]are smaller,there is no ZBCP.Otherwise,the ZBCP will appear.The position otbias conductance peak(BCP)depends strongly on the amplitude ratio of two components for dx2-2+idxy mixedwave.The lOW and narrow ZBCP may coexist with the BCP in the tunnelling conductance.Using those features in thetunnelling conductance of q/I/dx2-y2+idxy junctions,it can distinguish dx2-y2+idxy mixed wave superconductorfrom d-and p-wave one.