Nonlinear electromagnetic response and Higgs-mode excitation in BCS superconductors with impurities
Mikhail Silaev
DOI 10.1103/PhysRevB.99.224511 · 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 reveal that due to the presence of disorder oscillations of the order parameter amplitude called the Higgs mode can be effectively excited by the external electromagnetic radiation in usual BCS superconductors. This mechanism works for superconductors with both isotropic s-wave and anisotropic, such as d-wave, pairings. The nonlinear response in the presence of impurities is captured by the quasiclassical formalism. We demonstrate that analytical solutions of the Eilenberger equation with impurity collision integral and external field drive coincide with the exact summation of ladder impurity diagrams. Using the developed formalism we show that resonant third-harmonic signal observed in recent experiments is naturally explained by the excitation of Higgs mode mediated by impurity scattering.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| NbN Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
Similar papers
Nonlinear light–Higgs coupling in superconductors beyond BCS: Effects of the retarded phonon-mediated interaction
similarity 0.97Naoto Tsuji et al.
Source status unknown — claims are unverified
Theory of driven Higgs oscillations and third-harmonic generation in unconventional superconductors
similarity 0.97Lukas Schwarz & Dirk Manske
Source status unknown — claims are unverified
Higgs amplitude mode in ballistic superconducting hybrid junctions
similarity 0.96P. Vallet & J. Cayssol
Source status unknown — claims are unverified
Theory of light-induced resonances with collective Higgs and Leggett modes in multiband superconductors
similarity 0.96Yuta Murotani et al.
Source status unknown — claims are unverified
Signatures of the Higgs mode in transport through a normal-metal–superconductor junction
similarity 0.96Gaomin Tang et al.
Source status unknown — claims are unverified
Damping of the collective amplitude mode in superconductors with strong electron-phonon coupling
similarity 0.95Yuta Murakami et al.
Source status unknown — claims are unverified