scholarly journals Electronic phase transitions in the half-filled ionic Hubbard model

2008 ◽  
Vol 78 (7) ◽  
Author(s):  
L. Craco ◽  
P. Lombardo ◽  
R. Hayn ◽  
G. I. Japaridze ◽  
E. Müller-Hartmann
Keyword(s):  
Phase Transitions ◽  
Hubbard Model ◽  
Electronic Phase ◽  
Ionic Hubbard Model

scholarly journals Phase transitions of the ionic Hubbard model on the honeycomb lattice

2015 ◽  
Vol 5 (1) ◽  
Author(s):  
Heng-Fu Lin ◽  
Hai-Di Liu ◽  
Hong-Shuai Tao ◽  
Wu-Ming Liu
Keyword(s):  
Phase Transitions ◽  
Hubbard Model ◽  
Honeycomb Lattice ◽  
Ionic Hubbard Model

scholarly journals Probing the Bond Order Wave Phase Transitions of the Ionic Hubbard Model by Superlattice Modulation Spectroscopy

2017 ◽  
Vol 119 (23) ◽  
Author(s):  
Karla Loida ◽  
Jean-Sébastien Bernier ◽  
Roberta Citro ◽  
Edmond Orignac ◽  
Corinna Kollath
Keyword(s):  
Phase Transitions ◽  
Hubbard Model ◽  
Bond Order ◽  
Modulation Spectroscopy ◽  
Wave Phase ◽  
Ionic Hubbard Model

PHASE TRANSITION IN THE HALF-FILLED IONIC HUBBARD MODEL: MEAN-FIELD SLAVE BOSON STUDY

2012 ◽  
Vol 26 (03) ◽  
pp. 1150016 ◽  
Author(s):  
DUC-ANH LE ◽  
ANH-TUAN HOANG
Keyword(s):  
Hubbard Model ◽  
Mean Field ◽  
Coulomb Repulsion ◽  
Mott Insulator ◽  
Metallic Phase ◽  
Electronic Phase ◽  
Paramagnetic Solution ◽  
Boson Theory ◽  
Zero Values ◽  
Ionic Hubbard Model

We study electronic phase transitions in the half-filled ionic Hubbard model with an on-site Coulomb repulsion U and an ionic energy Δ by using the Kotliar–Ruckenstein slave-boson theory. Assuming a paramagnetic solution, we show that for any non-zero values of Δ, with increasing U the system undergoes a transition from band-insulator to Mott-insulator. Our results have implied the absence of a metallic phase between the band and the Mott insulator phases.

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