Half-quantum vortices in nematic and chiral phases of

Robert C. Regan, Joshua J. Wiman, J. A. Sauls

Research output: Contribution to journalArticlepeer-review

6 Scopus citations


We report theoretical results for the stability of half-quantum vortices (HQVs) in the superfluid phases of confined in highly anisotropic Nafen aerogel. Superfluidity of confined in Nafen is the realization of a “nematic superfluid” with Cooper pairs condensed into a single -wave orbital aligned along the anisotropy axis of the Nafen aerogel. In addition to the nematic phase, we predict a second “chiral” phase that onsets at a lower transition temperature. This chiral phase spontaneously breaks time-reversal symmetry and is a topological superfluid. Both superfluid phases are equal-spin pairing condensates that host arrays of HQVs as equilibrium states of rotating superfluid . We present results for the structure of HQVs, including magnetic and topological signatures of HQVs in both the nematic and chiral phases of -Nafen.

Original languageEnglish (US)
Article number024513
JournalPhysical Review B
Issue number2
StatePublished - Jul 1 2021

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics


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