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

Ramanjit Sohal, Eduardo Fradkin

Research output: Contribution to journalArticlepeer-review

Abstract

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.

Original languageEnglish (US)
Article number245154
JournalPhysical Review B
Volume101
Issue number24
DOIs
StatePublished - Jun 15 2020

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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