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Berry curvature effects on quasiparticle dynamics in superconductors | | Zhi Wang
; Liang Dong
; Cong Xiao
; Qian Niu
; | | Date: |
26 Aug 2020 | | Abstract: | We construct a theory for the semiclassical dynamics of superconducting
quasiparticles by following their wave-packet motion and reveal rich contents
of momentum-space, real-space and phase-space Berry curvatures that are traced
back to the characteristics of superconductivity, including the nontrivial
momentum-space geometry of superconducting pairing, the real-space
supercurrent, as well as the charge dipole of charge non-conserved
quasiparticles. These 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
$d_{x^{2}+y^{2}}+id_{xy}$ superconducting gap function, and demonstrate
Berry-curvature induced effects. | | Source: | arXiv, 2008.11374 | | Services: | Forum | Review | PDF | Favorites | |
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