Clocked single-spin source based on a spin-split superconductor
arXiv:1602.09068 · doi:10.1088/1367-2630/18/8/083019
Abstract
We propose an accurate clocked single-spin source for ac-spintronic applications. Our device consists of a superconducting island covered by a ferromagnetic insulator layer through which it is coupled to superconducting leads. Single-particle transfer relies on the energy gaps and the island's charging energy, and is enabled by a bias and a time-periodic gate voltage. Accurate spin transfer is achieved by the ferromagnetic insulator layer which polarizes the island, provides spin-selective tunneling barriers and improves the precision by suppressing Andreev reflection. We analyze realistic material combinations and experimental requirements which allow for a clocked spin current in the MHz regime.
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- Thermal, electric and spin transport in superconductor/ferromagnetic-insulator structures
- Gauge freedom in observables and Landsbergs nonadiabatic geometric phase: pumping spectroscopy of interacting open quantum systems
- Quantum transport phenomena induced by time-dependent fields
- Theory of Andreev reflection spectroscopy with anisotropic spin-dependent scattering