Missing 2k_F Response for Composite Fermions in Phonon Drag
Mesoscale and Nanoscale Physics
2009-10-31 v1 Strongly Correlated Electrons
Abstract
The response of composite Fermions to large wavevector scattering has been studied through phonon drag measurements. While the response retains qualitative features of the electron system at zero magnetic field, notable discrepancies develop as the system is varied from a half-filled Landau level by changing density or field. These deviations, which appear to be inconsistent with the current picture of composite Fermions, are absent if half-filling is maintained while changing density. There remains, however, a clear deviation from the temperature dependence anticipated for 2k_F scattering.
Cite
@article{arxiv.cond-mat/9907396,
title = {Missing 2k_F Response for Composite Fermions in Phonon Drag},
author = {S. Zelakiewicz and H. Noh and T. J. Gramila and L. N. Pfeiffer and K. W. West},
journal= {arXiv preprint arXiv:cond-mat/9907396},
year = {2009}
}
Comments
4 pages, 3 figures. Submitted to Phys. Rev. Lett