Phase Diagram of the Low-Density Two-Dimensional Homogeneous Electron Gas
Mesoscale and Nanoscale Physics
2010-03-02 v1 Quantum Gases
Abstract
We have used quantum Monte Carlo methods to calculate the zero-temperature phase diagram of the two-dimensional homogeneous electron gas. We find a transition from a paramagnetic fluid to an antiferromagnetic triangular Wigner crystal at density parameter r_s=31(1) a.u. and a transition to a ferromagnetic crystal at r_s=38(5) a.u. The fully spin-polarized fluid is never stable. We searched for, but did not find, the ferromagnetic hybrid phase proposed by H. Falakshahi and X. Waintal [Phys. Rev. Lett. 94, 046801 (2005)].
Keywords
Cite
@article{arxiv.1002.2101,
title = {Phase Diagram of the Low-Density Two-Dimensional Homogeneous Electron Gas},
author = {N. D. Drummond and R. J. Needs},
journal= {arXiv preprint arXiv:1002.2101},
year = {2010}
}