Magnetic Susceptibility of Multiorbital Systems
Strongly Correlated Electrons
2009-08-11 v2
Abstract
Effects of orbital degeneracy on magnetic susceptibility in paramagnetic phases are investigated within a mean-field theory. Under certain crystalline electric fields, the magnetic moment consists of two independent moments, e.g., spin and orbital moments. In such a case, the magnetic susceptibility is given by the sum of two different Curie-Weiss relations, leading to deviation from the Curie-Weiss law. Such behavior may be observed in d- and f-electron systems with t_{2g} and Gamma_8 ground states, respectively. As a potential application of our theory, we attempt to explain the difference in the temperature dependence of magnetic susceptibilities of UO_2 and NpO_2.
Cite
@article{arxiv.cond-mat/0509788,
title = {Magnetic Susceptibility of Multiorbital Systems},
author = {Katsunori Kubo and Takashi Hotta},
journal= {arXiv preprint arXiv:cond-mat/0509788},
year = {2009}
}
Comments
4 pages, 3 figures