Scattering theory of magnetic/superconducting junctions with spin active interfaces
arXiv:1107.0819 · doi:10.1103/PhysRevB.84.024531
Abstract
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.
12 pages
References in corpus (9)
- Measurement of the Spin-Transfer-Torque Vector in Magnetic Tunnel Junctions
- Andreev Reflection In Ferromagnet-Superconductor Junctions
- Andreev Reflection in Ferromagnet/Superconductor/Ferromagnet Double Junction Systems
- Spin-active interfaces and unconventional pairing in half-metalsuperconductor junctions
- Spin-Transfer Torque and Magnetoresistance in Superconducting Spin-Valves
- Ferromagnet-superconductor proximity effect: The clean limit
- Spin-torque generation by dc or ac voltages in magnetic layered structures
- Adiabatic quantum pumping, magnification effects and quantum size effects of spin-torque in magnetic tunnel junctions
- Scattering approach to current and noise in interacting mesoscopic systems