Switchable crossed spin conductance in a graphene-based junction: The role of spin-orbit coupling
| Autor: | Razieh Beiranvand, Hossein Hamzehpour |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
lcsh:Medicine
02 engineering and technology 01 natural sciences Article law.invention symbols.namesake law Electric field 0103 physical sciences 010306 general physics Condensed-matter physics lcsh:Science Physics Superconductivity Condensed Matter::Quantum Gases Multidisciplinary Condensed matter physics Spintronics Graphene Condensed Matter::Other lcsh:R Conductance Spin–orbit interaction 021001 nanoscience & nanotechnology Condensed Matter::Mesoscopic Systems and Quantum Hall Effect Applied physics Ferromagnetism Dirac fermion symbols Condensed Matter::Strongly Correlated Electrons lcsh:Q 0210 nano-technology |
| Zdroj: | Scientific Reports, Vol 10, Iss 1, Pp 1-7 (2020) Scientific Reports |
| ISSN: | 2045-2322 |
| Popis: | We theoretically investigate the crossed spin conductance (CSC) of a graphene-based heterostructure consists of ferromagnet, Rashba spin-orbit and superconductor regions. Using Dirac Bogoliubov-de Gennes formalism in the ballistic regime, we show that in the presence of Rashba spin-orbit coupling there are an anomalous crossed Andreev reection and spin-ipped co-tunneling in the process of quantum transport. We demonstrate that the CSC can be reversed with respect to charge conductance by tuning the Rashba spin-orbit coupling which experimentally can be adjusted by the applied perpendicular electric field on the graphene sheet. This feature in addition to a long spin relaxation time of Dirac fermions in graphene proposes designing a device with a non-local spin switch which is crucial for spintronics circuits. |
| Databáze: | OpenAIRE |
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