2021/04/19 by Morteza Salehi, Salehi, Morteza, Razieh Beiranvand +3
Materials Science · Physics and Astronomy · #FOS: Physical sciences #Graphene research and applications #Magnetic properties of thin films #Mesoscale and Nanoscale Physics (cond-mat.mes-hall) #Quantum and electron transport phenomena
paper · pdf · doi:10.48550/arxiv.2104.09039
openalex publication_date 2021/04/19 · openalex created_date 2022/07/25 · openalex updated_date 2026/07/28
We theoretically study spin-transfer torque (STT) in a graphene system with\nspin-orbit coupling (SOC). We consider a graphene-based junction where the\nspin-orbit coupled region is sandwiched between two ferromagnetic (F) segments.\nThe magnetization in each ferromagnetic segment can possess arbitrary\norientations. Our results show that the presence of SOC results in\nanisotropically modified STT, magnetoresistance, and charge conductance as a\nfunction of relative magnetization misalignment in the F regions. We have found\nthat within the Klein regime, where particles hit the interfaces\nperpendicularly, the spin-polarized Dirac fermions transmit perfectly through\nthe boundaries of an F-F junction (i.e., with zero reflection), regardless of\nthe relative magnetization misalignment and exert zero STT. In the presence of\nSOC, however, due to band structure modification, a nonzero STT reappears. Our\nfindings can be exploited for experimentally examining proximity-induced SOC\ninto a graphene system\n