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- W2557223734 abstract "A wide variety of two-dimensional electron systems (2DES) allow for independent control of the total and relative charge density of two-component fractional quantum Hall (FQH) states. Intriguingly, in some systems at total filling $nu_T = frac{1}{2}$ a transition is observed between a compressible and incompressible phase as the relative charge density is tuned. Naively this transition would be mediated by bosonic excitons, which consist of an electron-hole excitation between the two components. We show that these systems can also support fermionic excitons, due to the topological order of even denominator FQH states. Bosonic excitons can condense to yield interlayer coherent phases, while fermionic excitons can form an emergent Fermi surface in an incompressible FQH insulator. Exact diagonalization studies for up to 16 electrons find that the fermionic is lower in energy, suggesting that a fractionalized exciton metal may be realizable experimentally. We suggest several detection schemes by which the different scenarios may be experimentally distinguished." @default.
- W2557223734 created "2016-11-30" @default.
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- W2557223734 date "2016-11-03" @default.
- W2557223734 modified "2023-09-27" @default.
- W2557223734 title "Fractionalized exciton Fermi surfaces and condensates in two-component quantized Hall states" @default.
- W2557223734 hasPublicationYear "2016" @default.
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