Higgs amplitude mode in ballistic superconducting hybrid junctions
arXiv:2307.06019 · doi:10.1103/PhysRevB.108.094515
Abstract
In superconductors (SC), the Higgs amplitude mode is a coherent oscillation of the order parameter typically generated by THz laser irradiation. In this paper we propose to probe the Higgs mode using electronic transport in ballistic superconducting hybrid devices. We first confirm the existence of a non-zero amplitude mode in the clean case using the Keldysh-Eilenberger formalism. We then investigate two different geometries, respectively a normal-insulating-superconductor (NIS) tunnel junction and a NSN junction with transparent interfaces, the superconductor being irradiated in both situations. In the NIS case, the Higgs manifests itself in the second-order AC current response which is resonant at the Higgs frequency. In the NSN case, the DC differential conductance allows to probe the gaps generated by the Higgs mode in the Floquet spectrum.
arXiv comment13 pages, 8 figures
References in corpus (21)
- Floquet scattering theory of quantum pumps
- Higgs Amplitude Mode in BCS Superconductors NbTiN induced by Terahertz Pulse Excitation
- Higgs Mode in Superconductors
- Phase coherent transport in hybrid superconducting nanostructures
- Theory of Anderson pseudospin resonance with Higgs mode in superconductors
- Non-linear optical effects and third-harmonic generation in superconductors: Cooper-pairs vs Higgs mode contribution
- Optical response of graphene under intense terahertz fields
- Effect of radiation on transport in graphene
- Hierarchy of Floquet gaps and edge states for driven honeycomb lattices
- Phase-resolved Higgs response in superconducting cuprates
- Higgs mode in the d-wave superconductor Bi2Sr2CaCu2O8+x driven by an intense terahertz pulse
- Polarization-resolved terahertz third-harmonic generation in a superconductor NbN: dominance of Higgs mode beyond the BCS approximation
- Nonlinear electromagnetic response and Higgs mode excitation in BCS superconductors with impurities
- Nonlinear optical response of collective modes in multiband superconductors assisted by nonmagnetic impurities
- Nonlinear light-Higgs coupling in superconductors beyond BCS: Effects of the retarded phonon-mediated interaction
- Polarization dependence of the third-harmonic generation in multiband superconductors
- Tunneling transport in NSN junctions made of Majorana nanowires across the topological quantum phase transition
- Gauge-invariant microscopic kinetic theory of superconductivity: application to electromagnetic response of Nambu-Goldstone and Higgs modes
- Gauge-invariant microscopic kinetic theory of superconductivity in response to electromagnetic fields
- Ballistic transport through irradiated graphene
- Signatures of the Higgs mode in transport through a normal-metal--superconductor junction