Half quantum vortices in a nematic superconductor

Pye Ton How; Sung-Kit Yip

doi:10.1103/PhysRevResearch.2.043192

← Back to search

Half quantum vortices in a nematic superconductor

Pye Ton How, Sung-Kit Yip

DOI 10.1103/PhysRevResearch.2.043192 · Physical Review Research

T1

Active bibliographic source — not scientific approval

Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.

Abstract

Motivated by the superconductivity of MxBi2Se3, we study topological excitations in a nematic superconductor using Ginzburg-Landau theory. An isolated excitation at low field is shown to be either a distorted phase vortex or a tightly-bounded pair of half quantum vortices. Close to upper critical field Hc2, the vortex lattice is shown to be always hexagonal in the extreme type-II limit. Due to the different symmetries of the vortex lattice states, at least two phase transitions must take place when the external field is lowered from Hc2.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
MxBi2Se3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown