Abstract

Quantum interference effects on the spin-dependent transport in a molecular spin-valve, as FM/Benzene/FM model junction, in which a benzene molecule attached to ferromagnetic (FM) three-dimensional leads is numerically investigated. Using a generalized Green’s function method and in the framework of Landauer–Büttiker formalism, the variation of interference conditions is determined by rotation of the benzene molecule, and replacement of the connection configurations of the molecule to the FM leads from ortho to meta and then para configuration. We have found that transport characteristics, including the spin-dependent current and tunnel magnetoresistance (TMR) are strongly influenced by the quantum interference effects. Besides, the effect of an in-plane electric field on the spin-dependent transport characteristics is treated.