1. Emergence of a spin microemulsion in spin-orbit coupled Bose-Einstein condensates
- Author
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McGarrigle, Ethan C., Delaney, Kris T., Balents, Leon, and Fredrickson, Glenn H.
- Subjects
Condensed Matter - Quantum Gases - Abstract
We report the first numerical prediction of a "spin microemulsion" -- a phase with undulating spin domains resembling classical bicontinuous oil-water-surfactant emulsions -- in two-dimensional systems of spinor Bose-Einstein condensates with isotropic Rashba spin-orbit coupling. Using field-theoretic numerical simulations, we investigated the melting of a low-temperature stripe phase with supersolid character and find that the stripes lose their superfluidity at elevated temperature and undergo a Kosterlitz--Thouless-like transition into a spin microemulsion. Momentum distribution calculations highlight a thermally broadened occupation of the Rashba circle of low-energy states with macroscopic and isotropic occupation around the ring. We provide a finite-temperature phase diagram that positions the emulsion as an intermediate, structured isotropic phase with residual quantum character before transitioning at higher temperature into a structureless normal fluid., Comment: Main text: 7 pages, 5 figures. Supplementary Material: 5 pages, 5 figures
- Published
- 2023
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