Spin transport in diffusive superconductors
نویسندگان
چکیده
We employ the Keldysh formalism in the quasiclassical approximation to study transport in a diffusive superconductor. The resulting 434 transport equations describe the flow of charge and energy as well as the corresponding flow of spin and spin energy. Spin-flip scattering due to magnetic impurities is included. We find that the spin-flip length is renormalized in the superconducting case and propose an experimental system to measure the spin accumulation in a superconductor.
منابع مشابه
جریان بار واسپین در فلز نرمال ساندویچ شده توسط دو ابررسانای p-wave
Charge and spin transport properties of a clean $SNS$ Josephson junction (triplet superconductor-normal metal-triplet superconductor) are studied using the quasiclassical Eilenberger equation of Green’s function. Our system consists of two p-wave superconducting crystals separated by a Copper nano layer. Effects of thickness of normal layer between superconductors on the spin and charge current...
متن کاملLong-range spin accumulation from heat injection in mesoscopic superconductors with Zeeman splitting.
We describe far-from-equilibrium nonlocal transport in a diffusive superconducting wire with a Zeeman splitting, taking into account different spin relaxation mechanisms. We demonstrate that due to the Zeeman splitting, an injection of current in a superconducting wire creates spin accumulation that can only relax via thermalization. This effect leads to a long-range spin accumulation detectabl...
متن کاملSpin Dependent Transport in Magnetic Nanostructures
Recent progress in physics on spin dependent transport in magnetic nanostructures is reviewed. Special attention is paid on the spin accumulation and spin current caused by spin injection into non-magnetic metals and semiconductors and superconductors. A variety of phenomena induced in nano-superconductor/ferromagnet devices are proposed, examining the spin-charge separation in superconductors.
متن کاملGeneral boundary conditions for quasiclassical theory of superconductivity in the diffusive limit: application to strongly spin-polarized systems
Boundary conditions in quasiclassical theory of superconductivity are of crucial importance for describing proximity effects in heterostructures between differentmaterials. Although they have been derived for the ballistic case in full generality, corresponding boundary conditions for the diffusive limit, described byUsadel theory, have been lacking for interfaces involving strongly spin-polari...
متن کاملTheory of the proximity effect in junctions with unconventional superconductors.
We present a general theory of the proximity effect in junctions between diffusive normal metals (DN) and superconductors. Various possible symmetry classes in a superconductor are considered: even-frequency spin-singlet even-parity (ESE) state, even-frequency spin-triplet odd-parity state, odd-frequency spin-triplet even-parity (OTE) state and odd-frequency spin-singlet odd-parity state. It is...
متن کامل