Influence of the quantum zero-point motion of a vortex on the electronic spectra of s-wave superconductors
Lorenz Bartosch, Subir Sachdev
DOI 10.1103/PhysRevB.74.144515 · Physical Review B
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Abstract
We compute the influence of the quantum zero-point motion of a vortex on the electronic quasiparticle spectra of s-wave superconductors. The vortex is assumed to be pinned by a harmonic potential, and its coupling to the quasiparticles is computed in the framework of BCS theory. Near the core of the vortex, the motion leads to a shift of spectral weight away from the chemical potential, and thereby reduces the zero bias conductance peak; additional structure at the frequency of the harmonic trap is also observed.
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