Scattering theory of magnetic/superconducting junctions with spin-active interfaces

Article

关键词: ANDREEV REFLECTION;    TUNNEL-JUNCTIONS;    METAL;    SUPERCONDUCTORS;    CONDUCTANCE;    SYSTEMS;   

DOI  :  10.1103/PhysRevB.84.024531

来源: SCIE

【 摘 要 】

We formulate a generalized scattering field theory a la Buttiker describing particles transport in magnetic/superconducting heterostructures. The proposed formalism, characterized by a four-component spinorial wavefunction of the Bogoliubov de Gennes theory, allows to describe the spin flipping phenomena induced by noncollinear magnetizations in the scattering region. As a specific application of the theory, we analyze the conductance, the magnetoresistance, and the generation of spin-torque produced by an applied voltage in a spin-valve system. Quantum size effects and quantum beating patterns both in the conductance and in the spin-torque are carefully described.

【 授权许可】

Free