Stimulated quasiparticles in spin-split superconductors
Virtanen, P., Heikkilä, T., & Bergeret, F. S. (2016). Stimulated quasiparticles in spin-split superconductors. Physical Review B, 93(1), Article 014512. https://doi.org/10.1103/PhysRevB.93.014512
Published inPhysical Review B
© 2016 American Physical Society. Published in this repository with the kind permission of the publisher.
In superconductors spin split by an exchange field, thermal effects are coupled to spin transport. We show how an oscillating electromagnetic field in such systems creates spin imbalance, that can be detected with a spin-polarized probe. The sign and magnitude of the probe signal result from a competition between processes converting field-induced spin energy imbalance to spin imbalance, dominant at low frequencies, and microwave-driven pair breaking at high frequencies. In the presence of spin-flip scattering, we show that ac excitation also leads to multistabilities in the superconducting state.
PublisherAmerican Physical Society
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