Selfenergies, renormalization factor, Luttinger sum rule and quasiparticle structure of the Hubbard systems
Abstract
In this paper, the authors give a method for obtaining the renormalized electronic structure of the Hubbard systems. The first step is the determination of the selfenergy beyond the HartreeFock approximation. This selfenergy is constructed from several dielectric response functions. The second step is the determination of the quasiparticle band structure calculation which is performed from an appropriate modification of the augmented plane wave method. The third step consists in the determination of the renormalized density of states deduced from the spectral functions. The analysis of the renormalized density of states of the strongly correlated systems leads to the conclusion that there exist three types of resonances in their electronic structures, the lower energy resonances (LER), the middle energy resonances (MER) and the upper energy resonances (UER).
 Authors:

 Universidad Autonoma de Barcelona (Spain)
 Publication Date:
 OSTI Identifier:
 6986046
 Resource Type:
 Journal Article
 Journal Name:
 International Journal of Modern Physics A; (United States)
 Additional Journal Information:
 Journal Volume: 7:18; Journal ID: ISSN 0217751X
 Country of Publication:
 United States
 Language:
 English
 Subject:
 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; HUBBARD MODEL; ELECTRONIC STRUCTURE; CALCULATION METHODS; DIELECTRIC PROPERTIES; ELECTRON CORRELATION; ENERGYLEVEL DENSITY; HARTREEFOCK METHOD; QUASI PARTICLES; RENORMALIZATION; RESONANCE; SELFENERGY; SUM RULES; CORRELATIONS; CRYSTAL MODELS; ELECTRICAL PROPERTIES; ENERGY; EQUATIONS; MATHEMATICAL MODELS; PHYSICAL PROPERTIES; 665000*  Physics of Condensed Matter (1992)
Citation Formats
LopezAguilar, F, and CostaQunitana, J. Selfenergies, renormalization factor, Luttinger sum rule and quasiparticle structure of the Hubbard systems. United States: N. p., 1992.
Web. doi:10.1142/S0217979292001195.
LopezAguilar, F, & CostaQunitana, J. Selfenergies, renormalization factor, Luttinger sum rule and quasiparticle structure of the Hubbard systems. United States. https://doi.org/10.1142/S0217979292001195
LopezAguilar, F, and CostaQunitana, J. Mon .
"Selfenergies, renormalization factor, Luttinger sum rule and quasiparticle structure of the Hubbard systems". United States. https://doi.org/10.1142/S0217979292001195.
@article{osti_6986046,
title = {Selfenergies, renormalization factor, Luttinger sum rule and quasiparticle structure of the Hubbard systems},
author = {LopezAguilar, F and CostaQunitana, J},
abstractNote = {In this paper, the authors give a method for obtaining the renormalized electronic structure of the Hubbard systems. The first step is the determination of the selfenergy beyond the HartreeFock approximation. This selfenergy is constructed from several dielectric response functions. The second step is the determination of the quasiparticle band structure calculation which is performed from an appropriate modification of the augmented plane wave method. The third step consists in the determination of the renormalized density of states deduced from the spectral functions. The analysis of the renormalized density of states of the strongly correlated systems leads to the conclusion that there exist three types of resonances in their electronic structures, the lower energy resonances (LER), the middle energy resonances (MER) and the upper energy resonances (UER).},
doi = {10.1142/S0217979292001195},
url = {https://www.osti.gov/biblio/6986046},
journal = {International Journal of Modern Physics A; (United States)},
issn = {0217751X},
number = ,
volume = 7:18,
place = {United States},
year = {1992},
month = {7}
}