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Paper   IPM / P / 14846
School of Physics
  Title:   Highly tunable time-reversal-invariant topological superconductivity in topological insulator thin films
  Author(s): 
1.  F. Parhizgar
2.  A. M. Black-Schaffer
  Status:   Published
  Journal: Scientific Reports
  Vol.:  7
  Year:  2017
  Pages:   9817
  Supported by:  IPM
  Abstract:
We study time-reversal-invariant topological superconductivity in topological insulator (TI) thin films with both intra- and inter-surface pairing. Nontrivial topology require either a -phase difference between the intra-surface pairing states, spin-triplet inter-surface pairing, which is necessarily odd in the surface index, or spin-singlet inter-surface pairing with a sign-changing tunnel coupling, present in many TI thin films. In all cases the topological phase and its Kramers pair of Majorana edge modes is highly tunable with an applied electric field and varied chemical potential.

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