title: Crystalline phase of strongly interacting fermi mixtures.
abstract: We show that the system of weakly bound molecules of heavy and light fermionic atoms is characterized by a long-range intermolecular repulsion and can undergo a gas-crystal quantum transition if the mass ratio exceeds a critical value. For the critical mass ratio above 100 obtained in our calculations, this crystalline order can be observed as a superlattice in an optical lattice for heavy atoms with a small filling factor. We also find that this novel system is sufficiently stable with respect to molecular relaxation into deep bound states and to the process of trimer formation.
authors.affiliation: Laboratoire de Physique Théorique et Modèles Statistiques, CNRS, Université Paris Sud, 91405 Orsay, France.
authors.forename: D S
authors.initials: DS
authors.lastname: Petrov
authors.forename: G E
authors.initials: GE
authors.lastname: Astrakharchik
authors.forename: D J
authors.initials: DJ
authors.lastname: Papoular
authors.forename: C
authors.initials: C
authors.lastname: Salomon
authors.forename: G V
authors.initials: GV
authors.lastname: Shlyapnikov