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

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

2010-09-30

arxiv.org/abs/1009.6068v2

Phys. Rev. B 84, 155447 (2011)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

7 pages, 5 figures

Scientific paper

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.

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