Itinerant ferromagnetism of a dipolar Fermi gas with Raman-induced spin-orbit coupling

• Published in: arXiv.org
• Main Authors: Feng, Xue-Jing, Zhao, Xing-Dong, Liu, Wu-Ming
• Format: Paper Journal Article
• Language: English
• Published: Ithaca Cornell University Library, arXiv.org 15.12.2021
• Subjects: Fermi gases; Ferromagnetism; Phase diagrams; Physics - Atomic Physics; Physics - Quantum Gases; Spin-orbit interactions
• ISSN: 2331-8422
• DOI: 10.48550/arxiv.2112.05898

We elucidate the itinerant ferromagnetism of a dipolar Fermi gas with a Raman-induced spin-orbit coupling by investigating the exotic phase diagrams at zero and finite temperature. It is revealed that the dipolar interaction along with spin-orbit coupling can corroborate the formation of ferromagnetism and the Raman coupling adversely eliminates the tendency to this ferromagnetism transition, which greatly transcends the general understanding of this subject with contact interaction only. We explore the ground states through the density and spin-flip distribution in momentum space, which exhibits novel degeneracy at strong Raman coupling indicated by a non-zero entropy at zero temperature. We calculate the transition temperatures well within the reach of an experimental system when altering the dipolar and spin-orbit coupling strength, which paves a way to the further experimental realization.