Enhanced quantum oscillatory magnetization and non-equilibrium currents in an interacting two-dimensional electron system in MgZnO/ZnO with repulsive scatterers
Mesoscale and Nanoscale Physics
2014-02-20 v1
Abstract
Torque magnetometry at low temperature and in high magnetic fields B is performed on a MgZnO/ZnO heterostructure incorporating a high-mobility two-dimensional electron system. We find a sawtooth-like quantum oscillatory magnetization M(B), i.e., the de Haas-van Alphen (dHvA) effect. At the same time, unexpected spike-like overshoots in M and non-equilibrium currents are observed which allow us to identify the microscopic nature and density of the residual disorder. The acceptor-like scatterers give rise to a magnetic thaw down effect which enhances the dHvA amplitude beyond the electron-electron interaction effects being present in the MgZnO/ZnO heterostructure
Keywords
Cite
@article{arxiv.1307.3504,
title = {Enhanced quantum oscillatory magnetization and non-equilibrium currents in an interacting two-dimensional electron system in MgZnO/ZnO with repulsive scatterers},
author = {M. Brasse and S. M. Sauther and J. Falson and Y. Kozuka and A. Tsukazaki and Ch. Heyn and M. A. Wilde and M. Kawasaki and D. Grundler},
journal= {arXiv preprint arXiv:1307.3504},
year = {2014}
}