Abstract
Domain walls in superfluid have gained renewed interest in light of experimental progress on confining helium in nanofabricated geometries. Here, we study the effect of strong-coupling corrections on domain wall width and interfacial tension by determining self-consistent solutions to spatially-dependent Ginzburg-Landau equations. We find that the formation of domain walls is generally energetically favored in strong coupling over weak coupling. Calculations were performed over a wide range of temperatures and pressures, showing decreasing interface energy with increasing temperature and pressure. This has implications for the observability of such domain walls in , which are of both fundamental interest and form the basis for spatially-modulated pair-density wave states, when stabilized by strong confinement.
- Received 2 June 2021
- Revised 9 August 2021
- Accepted 3 September 2021
DOI:https://doi.org/10.1103/PhysRevB.104.094520
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