2016/12/08 by H. Goudarzi, Hadi Goudarzi, Maryam Khezerlou +3 · 7 citations
Engineering · Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Condensed matter physics #Electrical engineering #Engineering #Ferromagnetism #Graphene research and applications #Insulator (electricity) #MAJORANA #Magnetic field #Magnetoresistance #Materials science #Optoelectronics #Physics #Quantum mechanics #Superconductivity #Topological Materials and Phenomena #Topological insulator #Topology (electrical circuits) #cond-mat.mes-hall
paper · pdf · doi:10.1016/j.physe.2016.12.002
published in Physica E Low-dimensional Systems and Nanostructures 87, 155-160 (Elsevier BV) · 12 pages, 8 figures, Physica E: Low-dimensional Systems and Nanostructures, 2017. arXiv admin note: substantial text overlap with arXiv:1701.08277
openalex publication_date 2016/12/08 · openalex created_date 2016/12/16 · arxiv created 2017/01/28 · arxiv updated 2017/02/01 · openalex updated_date 2026/08/05
Among the potential applications of topological insulators, we investigate theoretically the effect of coexistence of proximity-induced ferromagnetism and superconductivity on the surface states of 3-dimensional topological insulator, where the superconducting electron-hole excitations can be significantly affected by the magnetization of ferromagnetic order. We find that, Majorana mode energy, as a verified feature of TI F/S structure, along the interface sensitively depends on the magnitude of magnetization mzfs in FS region, while its slope in perpendicular incidence presents steep and no change. Since the superconducting gap is renormalized by a factor η(mzfs), hence Andreev reflection is more or less suppressed, and, in particular, resulting subgap tunneling conductance is more sensitive to the magnitude of magnetizations in FS and F regions. Furthermore, an interesting scenario happens at the antiparallel configuration of magnetizations mzf and mzfs resulting in magnetoresistance in N/F/FS junction, which can be controlled and decreased by tuning the magnetization magnitude in FS region.