Effective quantum pseudospin-1/2 model for Yb pyrochlore oxides
Strongly Correlated Electrons
2015-05-20 v1 Statistical Mechanics
Abstract
An effective quantum pseudospin-1/2 Hamiltonian for Yb_2TM_2O_7 (TM = Ti and Sn) is obtained in terms of the atomic Kramers ground doublet of the LS coupling and the crystalline electric field, which is almost described with J^z=\pm 1/2. It is calculated microscopically as the sum of Anderson's superexchange interaction and the magnetic dipole interaction. It is found that it shows a strong exchange anisotropy.
Keywords
Cite
@article{arxiv.1101.1230,
title = {Effective quantum pseudospin-1/2 model for Yb pyrochlore oxides},
author = {Shigeki Onoda},
journal= {arXiv preprint arXiv:1101.1230},
year = {2015}
}
Comments
6 pages including 2 figures