Spin-polarization coupling in multiferroic transition-metal oxides
Strongly Correlated Electrons
2009-11-13 v1 Materials Science
Abstract
A systematic microscopic theory of magnetically induced ferroelectricity and lattice modulation is presented for all electron configurations of Mott-insulating transition-metal oxides. Various mechanisms of polarization are identified in terms of a strong-coupling perturbation theory. Especially, the spin-orbit interaction acting on the ligand p orbitals is shown to give the ferroelectric polarization of the spin-current form, which plays a crucial role particularly in eg systems. Semiquantitative agreements with the multiferroic TbMnO3 are obtained. Predictions for X-ray and neutron scattering experiments are proposed to clarify the microscopic mechanism of the spin-polarization coupling in different materials.
Cite
@article{arxiv.cond-mat/0701614,
title = {Spin-polarization coupling in multiferroic transition-metal oxides},
author = {Chenglong Jia and Shigeki Onoda and Naoto Nagaosa and Jung Hoon Han},
journal= {arXiv preprint arXiv:cond-mat/0701614},
year = {2009}
}