Magnetic Phase Diagram of Hubbard Model in Three Dimensions: the Second-Order Local Approximation
Condensed Matter
2019-08-15 v1
Abstract
A local, second-order (truncated) approximation is applied to the Hubbard model in three dimensions. Lowering the temperature, at half-filling, the paramagnetic ground state becomes unstable towards the formation of a commensurate spin-density-wave (SDW) state (antiferromagnetism) and sufficiently far away from half-filling towards the formation of incommensurate SDW states. The incommensurate-ordering wavevector does not deviate much from the commensurate one, which is in accord with the experimental data for the SDW in chromium alloys.
Keywords
Cite
@article{arxiv.cond-mat/9604039,
title = {Magnetic Phase Diagram of Hubbard Model in Three Dimensions: the Second-Order Local Approximation},
author = {A. N. Tahvildar-Zadeh and J. K. Freericks and M. Jarrell},
journal= {arXiv preprint arXiv:cond-mat/9604039},
year = {2019}
}
Comments
plain tex, 16 pages, 5 Postscript figures