Coupled Ferromagnetic and Nematic Ordering of Fermions in an Optical Flux Lattice

Autor:	Baur, Stefan K., Cooper, Nigel R.
Rok vydání:	2012
Předmět:	Condensed Matter - Quantum Gases
Zdroj:	Phys. Rev. Lett. 109, 265301 (2012)
Druh dokumentu:	Working Paper
DOI:	10.1103/PhysRevLett.109.265301
Popis:	Ultracold atoms in Raman-dressed optical lattices allow for effective momentum-dependent interactions among single-species fermions originating from short-range s-wave interactions. These dressed-state interactions combined with very flat bands encountered in the recently introduced optical flux lattices push the Stoner instability towards weaker repulsive interactions, making it accessible with current experiments. As a consequence of the coupling between spin and orbital degrees of freedom, the magnetic phase features Ising nematic order. Comment: 5 pages, 4 figures (published version)
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1208.6540 Zobrazit plný text záznamu View this record from Arxiv