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Anderson-Higgs amplitude mode in Josephson junctions

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arxiv 2403.06878 v1 pith:GK64OVPO submitted 2024-03-11 cond-mat.mes-hall

Anderson-Higgs amplitude mode in Josephson junctions

classification cond-mat.mes-hall
keywords modeanderson-higgsamplitudecurrentjosephsonjunctionactivationbias
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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The Anderson-Higgs mode in a superconductor corresponds to a collective and coherent oscillation of the order parameter amplitude. We propose to detect this mode in a tunnel Josephson junction between two singlet s-wave diffusive superconductors. We find a strong enhancement of the tunneling current when the junction is pumped at the equilibrium gap frequency, corresponding to the activation of the Anderson-Higgs mode. By solving the Keldysh-Usadel equations, we obtain current peaks at specific bias voltages that can serve as signatures of the Anderson-Higgs mode.

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