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

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 $\Phi$, due to an imbalance between Weyl fermions of opposite chirality. A universal contribution $dI/d\Phi =(e/h{)}^2\mu$ (at equilibrium chemical potential $\mu$ 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.

arXiv comment9 pages, 8 figures; to be published in the "Eliashberg 90" special issue of Annals of Physics

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Cited by in corpus (3)

• Equilibrium current in a Weyl-semimetal - superconductor heterostructure
• Emergent Chern-Simons Interactions in 3+1 Dimensions
• Chiral Meissner effect in time-reversal invariant Weyl superconductors