Theory of pseudospin resonance for multiband superconductors
Kristian Hauser A. Villegas
DOI 10.1103/PhysRevB.108.174504 · Physical Review B
Active bibliographic source — not scientific approval
Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.
Abstract
We formulate a generalized pseudospin formalism for multiband superconductors in the presence of an external perturbing electromagnetic field. Our theory naturally captures the effects of quantum band geometric quantities and is valid even for flat-band superconductors. As an interesting consequence of our theory, we show that there is an interband pairing fluctuations induced by the external field and mediated by the quantum band geometry. Surprisingly, this interband fluctuation is independent of the band gap, which can be understood from the geometric nature of such novel fluctuations. We derive the generalized equation of motion for the multiband pseudospin and the self-consistency equation. We present a formal solution to the pseudospin equation of motion in powers of the perturbing electromagnetic field. As a simple illustration of our theory, we calculate the Leggett modes for the two-band case.
Similar papers
Theory of pseudospin resonance for multiband superconductors
similarity 0.92Kristian Hauser Villegas · 2023 · arXiv:2310.11195
Source status unknown — claims are unverified
Extrinsic spin-charge coupling in diffusive superconducting systems
similarity 0.89Chunli Huang et al.
Source status unknown — claims are unverified
Spin torques and magnetic texture dynamics driven by the supercurrent in superconductor/ferromagnet structures
similarity 0.89I. V. Bobkova et al.
Source status unknown — claims are unverified
Gauge theory of the long-range proximity effect and spontaneous currents in superconducting heterostructures with strong ferromagnets
similarity 0.89I. V. Bobkova et al.
Source status unknown — claims are unverified
Gauge-invariant theory of the Meissner effect in the lattice model of a superconductor with local pairing
similarity 0.88T. Kostyrko et al.
Source status unknown — claims are unverified
Fluctuation-induced pseudogap in the infrared optical conductivity of high-temperature superconductors
similarity 0.88Francesca Federici & Andrei A. Varlamov
Source status unknown — claims are unverified