Composite fermion theory of collective excitations in fractional quantum Hall effect

Details Composite fermion theory of collective excitations in fractional quantum Hall effect Composite fermion theory of collective excitations in fractional quantum Hall effect

1995-11-29

arxiv.org/abs/cond-mat/9511136v1

Physics

Condensed Matter

4 pages, 3 postscript figures

Scientific paper

10.1103/PhysRevLett.76.1332

The low energy neutral excitations of incompressible fractional quantum Hall states are called collective modes or magnetic excitons. This work develops techniques for computing their dispersion at general filling fractions for reasonably large systems. New structure is revealed; in particular, the collective mode at 1/3 is found to possess several minima, with the energy of the principal minimum significantly smaller than the earlier estimate. \pacs{73.40.Hm, 73.20.Dx, 73.20.Mf}

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