Topological phases and fractional excitations of the exciton condensate in a special class of bilayer systems

Abstract

We study the exciton condensate in zero temperature limit in a special class of electron-hole bilayer systems adjacent to insulating ferromagnetic films. With the self-consistent mean-field approximation, we find that the Rashba spin-orbit interaction in the electron and hole layers can induce the p \pm ip or p pairing states depending on the different magnetization of the overlapped ferromagnetic films. Correspondingly, the topologically nontrivial or trivial phases emerge. Furthermore, in the topologically nontrivial phase, the quasiparticle excitations of the U(1) vortex are attached to fractional quantum numbers and obey Abelian statistics.

7 pages, 5 figures

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Cited by in corpus (14)

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• Electron-hole pairing in topological insulator thin film
• Time Reversal Symmetric Topological Exciton Condensate in Bilayer HgTe Quantum Wells
• Coulomb interaction effects in graphene bilayers: electron-hole pairing and plasmaron formation
• Topological excitonic corner states and nodal phase in bilayer quantum spin Hall insulators
• Roton-maxon spectrum and instability for weakly interacting dipolar excitons in a semiconductor layer
• Interacting topological mirror excitonic insulator in one dimension
• Optical probing in a bilayer dark-bright condensate system
• Excitonic Josephson effect in double-layer graphene junctions
• Excitonic Tunneling in the AB-bilayer Graphene Josephson Junctions
• Electron-hole pairing of Fermi-arc surface states in a Weyl-semimetal bilayer
• Electron-hole pairing in topological insulator heterostructures in the quantum Hall state
• Topological spin-up triplet excitonic condensation in two-dimensional electron-hole systems
• Interplay of Rashba spin-orbit coupling and Coulomb interaction in topological spin-triplet excitonic condensates