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“School of Nano-Sciences”

Paper   IPM / Nano-Sciences / 15156
   School of Nano Science
  Title: Quantum transport in new two-dimensional heterostructures: thin films of topological insulators, phosphorene
1 . Leyla Majidi
2 . Moslem Zare
3 . Reza Asgari
  Status: Published
  Journal: Physica C: Superconductivity and its Applications (Invited paper)
  Vol.: 549
  Year: 2018
  Pages: 77
  Publisher(s): Elsevier B.V.
  Supported by: IPM
The unusual features of the charge and spin transport characteristics are investigated in new two-dimensional heterostructures. Intraband specular Andreev reflection is realized in a topological insulator thin film normal/superconducting junction in the presence of a gate electric field. Perfect specular electron-hole conversion is shown for different excitation energy values in a wide experimentally available range of the electric field and also for all angles of incidence when the excitation energy has a particular value. It is further demonstrated that the transmission probabilities of the incoming electrons from different spin subbands to the monolayer phosphorene ferromagnetic/normal/ferromagnetic (F/N/F) hybrid structure have different behavior with the angle of incidence and perfect transmission occurs at defined angles of incidence to the proposed structure with different length of the N region, and different alignments of magnetization vectors. Moreover, the sign change of the spin-current density is demonstrated by tuning the chemical potential and exchange field of the F region.

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