Orbital Order Instability and Orbital Excitations in Degenerate Itinerant Electron Systems
Materials Science
2007-05-23 v1 Strongly Correlated Electrons
Abstract
We present the theory of orbital ordering in orbital-degenerate itinerant electron systems. After proposing the criterion of instability for orbital ordering or orbital density wave ordering, we find that the orbital and the spin-orbital collective excitation spectra in ferro-orbital ordered phase exhibit finite gaps. The anomalous electronic energy spectra manifested in the angle-resolved photoemission spectroscopy (ARPES) and the orbital occupation in the resonant X-ray scattering (RXS) intensities are also presented for the orbital-ordered phase.
Keywords
Cite
@article{arxiv.cond-mat/0605379,
title = {Orbital Order Instability and Orbital Excitations in Degenerate Itinerant Electron Systems},
author = {Feng Lu and Dong-meng Chen and Liang-Jian Zou},
journal= {arXiv preprint arXiv:cond-mat/0605379},
year = {2007}
}
Comments
5 pages, 3 figures