期刊
PHYSICAL REVIEW B
卷 79, 期 24, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.79.245331
关键词
localised states; spin-orbit interactions; spontaneous symmetry breaking
We study three-dimensional systems where strong repulsion leads to an insulating state via spontaneously generated spin-orbit interactions. We discuss a microscopic model where the resulting state is topological. Such topological Mott insulators differ from their band-insulator counterparts in that they possess an additional order parameter, a rotation matrix, which describes the spontaneous breaking of spin-rotation symmetry. We show that line defects of this order are associated with protected one-dimensional modes in the strong topological Mott insulator that provides a bulk characterization of this phase. Possible physical realizations in cold-atom systems are discussed.
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