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- W2017105904 abstract "According to Wen's theory, a universal behavior of the fractional quantum Hall edge is expected at sufficiently low energies, where the dispersion of the elementary edge excitation is linear. A microscopic calculation shows that the actual dispersion is indeed linear at low energies, but deviates from linearity beyond certain energy, and also exhibits an ``edge roton minimum.'' We determine the edge exponent from a microscopic approach, and find that the nonlinearity of the dispersion makes a surprisingly small correction to the edge exponent even at energies higher than the roton energy. We explain this insensitivity as arising from the fact that the energy at maximum spectral weight continues to show an almost linear behavior up to fairly high energies. We also study, in an effective-field theory, how interactions modify the exponent for a reconstructed edge with multiple edge modes. Relevance to experiment is discussed." @default.
- W2017105904 created "2016-06-24" @default.
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- W2017105904 date "2010-08-13" @default.
- W2017105904 modified "2023-10-16" @default.
- W2017105904 title "Fractional quantum Hall edge: Effect of nonlinear dispersion and edge roton" @default.
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- W2017105904 doi "https://doi.org/10.1103/physrevb.82.075315" @default.
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