Universal chiral magnetic effect in the vortex lattice of a Weyl superconductor

M. J. Pacholski; C. W. J. Beenakker; İ. Adagideli

doi:10.1016/j.aop.2020.168103

paper

Universal chiral magnetic effect in the vortex lattice of a Weyl superconductor

arXiv:1911.00312 · doi:10.1016/j.aop.2020.168103

Abstract

It was shown recently that Weyl fermions in a superconducting vortex lattice can condense into Landau levels. Here we study the chiral magnetic effect in the lowest Landau level: The appearance of an equilibrium current $I$ along the lines of magnetic flux $Φ$ , due to an imbalance between Weyl fermions of opposite chirality. A universal contribution $d I / d Φ = (e / h)^{2} μ$ (at equilibrium chemical potential $μ$ relative to the Weyl point) appears when quasiparticles of one of the two chiralities are confined in vortex cores. The confined states are charge-neutral Majorana fermions.

9 pages, 8 figures; to be published in the "Eliashberg 90" special issue of Annals of Physics