Berezinskii-Kosterlitz-Thouless transitions in a ferromagnetic superfluid: effects of axial magnetization

Autor:	Underwood, Andrew P. C., Groszek, Andrew J., Yu, Xiaoquan, Blakie, P. B., Williamson, L. A.
Rok vydání:	2024
Předmět:	Condensed Matter - Quantum Gases
Zdroj:	Phys. Rev. A 110, 013311 (2024)
Druh dokumentu:	Working Paper
DOI:	10.1103/PhysRevA.110.013311
Popis:	An easy-plane ferromagnetic spin-1 Bose gas undergoes two Berezinskii-Kosterlitz-Thouless (BKT) transitions, associated with mass and spin superfluidity respectively. We study the effect of axial magnetization on the superfluid properties of this system. We find that nonzero axial magnetization couples mass and spin superflow, via a mechanism analogous to the Andreev-Bashkin effect present in two-component superfluids. With sufficiently large axial magnetization mass and spin superfluidity arise simultaneously. The cross-over to this phase provides a finite-temperature generalization of the zero-temperature broken-axisymmetric to easy-axis transition. We present analytic relations connecting mass and spin superfluidity with experimentally observable coherence of the three spinor components and local magnetization. Comment: 9 pages, 6 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/2404.03178 Zobrazit plný text záznamu View this record from Arxiv