Order parameters in the Verwey phase transition
Statistical Mechanics
2008-01-10 v1 Strongly Correlated Electrons
Abstract
The Verwey phase transition in magnetite is analyzed on the basis of the Landau theory. The free energy functional is expanded in a series of components belonging to the primary and secondary order parameters. A low-temperature phase with the monoclinic P2/c symmetry is a result of condensation of two order parameters X_3 and \Delta_5 . The temperature dependence of the shear elastic constant C_44 is derived and the mechanism of its softening is discussed.
Cite
@article{arxiv.0801.1420,
title = {Order parameters in the Verwey phase transition},
author = {P. Piekarz and K. Parlinski and A. M. Oles},
journal= {arXiv preprint arXiv:0801.1420},
year = {2008}
}
Comments
4 pages, 1 figure