Nonlocal transport properties of topological insulator F/I/SC/I/F junction with perpendicular magnetization

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• 作者：R. Vali (1)
  H.F. Khouzestani (1)
  
• 关键词：Mesoscopic and Nanoscale Systems
• 刊名：The European Physical Journal B - Condensed Matter
• 出版年：2014
• 出版时间：January 2014
• 年：2014
• 卷：87
• 期：1
• 全文大小：337 KB
• 作者单位：R. Vali (1)
  H.F. Khouzestani (1)
  
  1. School of Physics, Damghan University, P.O.Box 36715/364, Damghan, Islamic Republic of Iran
  
• ISSN：1434-6036

文摘

We investigate theoretically the nonlocal transport properties in a ferromagnet/insulator/superconductor/insulator/ferromagnet (F/I/SC/I/F) junction with perpendicular magnetization formed on a topological insulator. The nonlocal conductance through the junction depends strongly on whether the perpendicular magnetizations of the two ferromagnets are in a parallel or an antiparallel alignment. This stems from the fact that on the surface of three dimensional topological insulator the exchange field acts as vector potential and from spin-momentum locking property of the topological insulator surface states. It is found that the nonlocal conductance as a function of barrier strength of the I regions exhibits a quantum switch on-off property.