Theory of Doped Excitonic Insulators
Strongly Correlated Electrons
2007-05-23 v1
Abstract
The theory of doped excitonic insulators is reinvestigated in light of recent experiments on hexaborides. For the appropriate valley-degenerate X_3,X_3' band structure, ``intra-valley'' condensation is energetically favored. Ferromagnetism occurs upon doping due to the quenching of kinetic energy at the otherwise direct first-order excitonic insulator-metal transition. The phase diagram includes states of spatially inhomogeneous density and magnetization at low temperatures.
Cite
@article{arxiv.cond-mat/9906259,
title = {Theory of Doped Excitonic Insulators},
author = {Leon Balents and Chandra M. Varma},
journal= {arXiv preprint arXiv:cond-mat/9906259},
year = {2007}
}
Comments
4 pages