Berry curvature effects on quasiparticle dynamics in superconductors
arXiv:2008.11374 · doi:10.1103/PhysRevLett.126.187001
Abstract
We construct a theory for the semiclassical dynamics of superconducting quasiparticles by following their wave-packet motion and reveal rich contents of Berry curvature effects in the phase-space spanned by position and momentum. These Berry curvatures are traced back to the characteristics of superconductivity, including the nontrivial momentum-space geometry of superconducting pairing, the real-space supercurrent, and the charge dipole of quasiparticles. The Berry-curvature effects strongly influence the spectroscopic and transport properties of superconductors, such as the local density of states and the thermal Hall conductivity. As a model illustration, we apply the theory to study the twisted bilayer graphene with a superconducting gap function, and demonstrate Berry-curvature induced effects.
arXiv comment4 pages, 1 figure
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