Quantum Transport of Dirac fermions in graphene with a spatially varying Rashba spin-orbit coupling

摘要

We theoretically study electronic transport through a region withinhomogeneous Rashba spin-orbit (RSO) coupling placed between two normalregions in a monolayer graphene. The inhomogeneous RSO region is characterizedby linearly varying RSO strength within its borders and constant RSO strengthin the central region. We calculate the transmission properties within thetransfer matrix approach. It is shown that the amplitude of conductanceoscillations reduces and at the same time the magnitude of conductanceincreases with increasing border thickness. We also investigate how the Fanofactor can be modified by the border thickness of RSO region.