Intertwined order in fractional Chern insulators from finite-momentum pairing of composite fermions

Article

关键词: 2-DIMENSIONAL ELECTRON LIQUID;    DENSITY-WAVE;    2 DIMENSIONS;    HALL;    SUPERCONDUCTIVITY;    BREAKING;    PHASE;   

DOI  :  10.1103/PhysRevB.101.245154

来源: SCIE

【 摘 要 】

We investigate the problem of intertwined orders in fractional Chern insulators by considering lattice fractional quantum Hall (FQH) states arising from pairing of composite fermions in the square-lattice Hofstadter model. At certain filling fractions, magnetic translation symmetry ensures the composite fermions form Fermi surfaces with multiple pockets, leading to the formation of finite-momentum Cooper pairs in the presence of attractive interactions. We obtain mean-field phase diagrams exhibiting a rich array of striped and topological phases, establishing paired lattice FQH states as an ideal platform to investigate the intertwining of topological and conventional broken symmetry order.

【 授权许可】

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