Issue
EPL
Volume 84, Number 5, December 2008
Article Number 57009
Number of page(s) 5
Section Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties
DOI http://dx.doi.org/10.1209/0295-5075/84/57009
Published online 12 December 2008
EPL, 84 (2008) 57009
DOI: 10.1209/0295-5075/84/57009

Combining the hybrid functional method with dynamical mean-field theory

D. Jacob, K. Haule and G. Kotliar

Department of Physics and Astronomy, Rutgers University - 136 Frelinghuysen Road, Piscataway, NJ 08854, USA

djacob@physics.rutgers.edu

received 18 August 2008; accepted in final form 31 October 2008; published December 2008
published online 12 December 2008

Abstract
We present a new method to compute the electronic structure of correlated materials combining the hybrid functional method with the dynamical mean-field theory. As a test example of the method we study cerium sesquioxide, a strongly correlated Mott band insulator. The hybrid functional part improves the magnitude of the pd-band gap which is underestimated in the standard approximations to density functional theory while the dynamical mean-field theory part splits the 4f-electron spectra into a lower and an upper Hubbard band.

PACS
71.15.-m - Methods of electronic structure calculations.
71.27.+a - Strongly correlated electron systems; heavy fermions.

© EPLA 2008