Study of Low Energy Spin Rotons in the Fractional Quantum Hall Effect
Mesoscale and Nanoscale Physics
2009-11-07 v1
Abstract
Motivated by the discovery of extremely low energy collective modes in the fractional quantum Hall effect (Kang, Pinczuk {\em et al.}), with energies below the Zeeman energy, we study theoretically the spin reversed excitations for fractional quantum Hall states at and 3/7 and find qualitatively different behavior than for . We find that a low-energy, charge-neutral "spin roton," associated with spin reversed excitations that involve a change in the composite-fermion Landau level index, has energy in reasonable agreement with experiment.
Keywords
Cite
@article{arxiv.cond-mat/0103472,
title = {Study of Low Energy Spin Rotons in the Fractional Quantum Hall Effect},
author = {Sudhansu S. Mandal and J. K. Jain},
journal= {arXiv preprint arXiv:cond-mat/0103472},
year = {2009}
}
Comments
Postscript figures included. Accepted in Phys. Rev. B (Rapid Communication)