Phase transition and spin-wave dispersion in quantum Hall bilayers at filling factor nu=1
Mesoscale and Nanoscale Physics
2009-11-07 v2
Abstract
We present an effective Hamiltonian for a bilayer quantum Hall system at filling factor neglecting charge fluctuations. Our model is formulated in terms of spin and pseudospin operators and is an exact representation of the system within the above approximation. We analyze its low-lying excitations in terms of spin-wave theory. Moreover we add to previous first-principle exact-diagonalization studies concentrating on the quantum phase transition seen in this system.
Keywords
Cite
@article{arxiv.cond-mat/0105625,
title = {Phase transition and spin-wave dispersion in quantum Hall bilayers at filling factor nu=1},
author = {Anton Burkov and John Schliemann and A. H. MacDonald and S. M. Girvin},
journal= {arXiv preprint arXiv:cond-mat/0105625},
year = {2009}
}
Comments
Four pages, proceedings for EP2DS-14, Prague 2001