Octupole Moment as a Hidden Order Parameter in Orbitally Degenerate f-Electron Systems
Strongly Correlated Electrons
2009-10-31 v1
Abstract
Possibility of a novel pseudo-scalar (octupole) order is studied theoretically for orbitally degenerate systems with strong spin-orbit coupling such as CeLaB. It is discussed that coexistence of an octupole order parameter and antiferromagnetic fluctuation should lead to drastic softening of the elastic constant by a mode-mixing effect. Nonlinear coupling between dipole, quadrupole and octupole fluctuations is taken into account in terms of a Ginzburg-Landau-type functional which is derived microscopically through path integral.
Keywords
Cite
@article{arxiv.cond-mat/0001238,
title = {Octupole Moment as a Hidden Order Parameter in Orbitally Degenerate f-Electron Systems},
author = {Yoshio Kuramoto and Hiroaki Kusunose},
journal= {arXiv preprint arXiv:cond-mat/0001238},
year = {2009}
}
Comments
4 pages, 1 figure, to be published in J.Phys.Soc.Jpn