中国物理B ›› 2022, Vol. 31 ›› Issue (4): 40306-040306.doi: 10.1088/1674-1056/ac398f
Hao Zhu(朱浩)1, Shou-Gen Yin(印寿根)1,†, and Wu-Ming Liu(刘伍明)2,3,4,‡
Hao Zhu(朱浩)1, Shou-Gen Yin(印寿根)1,†, and Wu-Ming Liu(刘伍明)2,3,4,‡
摘要: We investigate the vortex structures excited by Ioffe-Pritchard magnetic field and Dresselhaus-type spin-orbit coupling in F=2 ferromagnetic Bose-Einstein condensates. In the weakly interatomic interacting regime, an external magnetic field can generate a polar-core vortex in which the canonical particle current is zero. With the combined effect of spin-orbit coupling and magnetic field, the ground state experiences a transition from polar-core vortex to Mermin-Ho vortex, in which the canonical particle current is anticlockwise. For fixed spin-orbit coupling strengths, the evolution of phase winding, magnetization, and degree of phase separation with magnetic field are studied. Additionally, with further increasing spin-orbit coupling strength, the condensate exhibits symmetrical density domains separated by radial vortex arrays. Our work paves the way to explore exotic topological excitations in high-spin systems.
中图分类号: (Tunneling, Josephson effect, Bose-Einstein condensates in periodic potentials, solitons, vortices, and topological excitations)