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Record: oai:ARNO:358806

AuthorsA. Hubener, M. Snoek, W. Hofstetter
TitleMagnetic phases of two-component ultracold bosons in an optical lattice
JournalPhysical Review B
Volume80
Year2009
Issue24
Pages245109-
ISSN10980121
FacultyFaculty of Science
Institute/dept.FNWI: Institute for Theoretical Physics (ITF)
AbstractWe investigate spin-order of ultracold bosons in an optical lattice by means of dynamical mean-field theory. A rich phase diagram with anisotropic magnetic order is found, both for the ground state and at finite temperatures. Within the Mott insulator, a ferromagnetic to antiferromagnetic transition can be tuned using a spin-dependent optical lattice. In addition we find a supersolid phase, in which superfluidity coexists with antiferromagnetic spin order. We present detailed phase diagrams at finite temperature for the experimentally realized heteronuclear 87Rb-41K mixture in a three-dimensional optical lattice.
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