Quantum interference hybrid spin-current injector

Abstract

We propose a quantum interference spin-injector nanodevice consisting of a superconductor-normal metal hybrid loop connected to a superconductor-ferromagnet bilayer via a tunneling junction. We show that for certain values of the applied voltage bias across the tunnel barrier and the magnetic flux through the loop the spin-current can be fully polarized. Moreover, by tuning the magnetic flux one can switch the sign of the spin polarization. This operation can be performed at frequencies within the tens of GHz range. We explore the nanodevice in a wide range of parameters, establish the optimum conditions for its experimental realization and discuss its possible applications.

4.5 pages, 4 color figures

References in corpus (6)

• Phase controlled superconducting proximity effect probed by tunneling spectroscopy
• Density of states and supercurrent in diffusive SNS junctions: role of nonideal interfaces and spin-flip scattering
• Superconductors as ideal spin sources for spintronics
• Electrically controlled quantum dot based spin current injector
• Remote-control spin filtering through a $T$-type structure
• Proposal for a correlation induced spin-current polarizer

Cited by in corpus (5)

• Revealing the magnetic proximity effect in EuS/Al bilayers through superconducting tunneling spectroscopy
• Proximity nanovalve with large phase-tunable thermal conductance
• Spectral characteristics of a fully-superconducting SQUIPT
• Heat transport and electron cooling in ballistic normal-metal/spin-filter/superconductor junctions
• Signatures of spin-triplet Cooper pairing in the density of states of spin-textured superconductor-ferromagnet bilayers