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- W4376167412 abstract "We study the coherent dynamic interaction of a time-dependent spin-splitting field with the homogeneous superconducting order parameter $Delta(t)$ mediated by spin-orbit coupling using the time-dependent Bogoliubov-de Gennes theory. In the first part of the work we show that linear response of the superconductor is strongly affected by the Zeeman field and spin-flip processes, giving rise to multiple resonant frequencies of the superconducting Higgs modes. These modes can be excited either by a quench, or by an additional non-stationary component of the spin-splitting field, which couples linearly to the Higgs modes. In the second part, we analyze the nonadiabatic dynamics of quasiparticle states arising from the intersection of spectral branches from different spin subbands, which can be provoked by a linearly growing Zeeman field. We provide insights into the dependence of the order parameter $Delta(t)$ on this field and interference effects caused by tunneling of states at the avoided crossing points. We also show that since the nonadiabatic tunneling is related to spin-flip processes, the quasiparticle gas experiences a dynamic magnetization that contributes to its spin susceptibility." @default.
- W4376167412 created "2023-05-12" @default.
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- W4376167412 date "2023-05-10" @default.
- W4376167412 modified "2023-10-05" @default.
- W4376167412 title "Collisionless dynamics of superconducting gap excited by spin-splitting field" @default.
- W4376167412 doi "https://doi.org/10.1103/physrevb.108.104507" @default.
- W4376167412 hasPublicationYear "2023" @default.
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