Generic Weyl phase in the vortex state of quasi-two-dimensional chiral superconductors
Tomohiro Yoshida, Masafumi Udagawa
DOI 10.1103/PhysRevB.94.060507 · Physical Review B
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Abstract
We study the collective behavior of Majorana modes in the vortex state of chiral p-wave superconductors. Away from the isolated vortex limit, the zero-energy Majorana states communicate with each other on a vortex lattice, and form a coherent band structure with a nontrivial topological character. We reveal that the topological nature of Majorana bands changes sensitively via quantum phase transitions in two-dimensional (2D) systems, by sweeping magnetic field or Fermi energy. Through the idea of dimensional reduction, we show the existence of a generic superconducting Weyl phase in a low magnetic field region of quasi-2D chiral superconductors.
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