 |
École polytechnique Open archive |  |
 |
Journal articles
Quasiparticle excitations in the photoemission spectrum of CuO from first principles: A GW study
Abstract : We present ab initio quasiparticle calculations for electronic excitations and the fundamental band gap of the strongly correlated transition-metal oxide CuO using the GW approximation of many-body perturbation theory. Problems related to the suitability of the method for strongly correlated materials and issues of self-consistency are addressed. We explain why quasiparticle self-consistent GW strongly overestimates the band gap of CuO. Apart from the band gap, electron addition and removal spectra in the quasiparticle approximation including lifetime and matrix-element effects are found to be in excellent agreement with the quasiparticle excitations in direct and inverse photoemission data.
https://hal-polytechnique.archives-ouvertes.fr/hal-01101010
Contributor : Gaëlle Bruant <>
Submitted on : Wednesday, January 7, 2015 - 3:51:23 PM
Last modification on : Tuesday, July 13, 2021 - 4:54:05 PM
Contributor : Gaëlle Bruant <>
Submitted on : Wednesday, January 7, 2015 - 3:51:23 PM
Last modification on : Tuesday, July 13, 2021 - 4:54:05 PM