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

机译:从复合费团的有限动量配对的分数挖掘绝缘子中交互顺序

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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.
机译:通过考虑晶格分数量子厅(FQH)各方在方形格子Hofstadter模型中的复合码头配对中产生的晶格分数量子大厅(FQH)各国来调查分数Chern绝缘体中交互订单的问题。在某些填充级分中,磁性平移对称性确保复合码头具有多个口袋的Fermi表面形成,导致在有吸引力的相互作用存在下形成有限的动量库对。我们获得了呈现丰富的条纹和拓扑阶段的平均场相图,建立配对的晶格FQH状态作为研究拓扑和传统破坏对称顺序的交织的理想平台。

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  • 来源
    《Physical review》 |2020年第24期|245154.1-245154.14|共14页
  • 作者单位

    Department of Physics and Institute for Condensed Matter Theory University of Illinois at Urbana-Champaign 1110 West Green Street Urbana Illinois 61801 USA;

    Department of Physics and Institute for Condensed Matter Theory University of Illinois at Urbana-Champaign 1110 West Green Street Urbana Illinois 61801 USA;

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