PHASE TRANSITION IN THE HALF-FILLED IONIC HUBBARD MODEL: MEAN-FIELD SLAVE BOSON STUDY-Reference-Cited by-同舟云学术

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

Published:2012-01-30 Issue:03 Volume:26 Page:1150016
ISSN:0217-9849
Container-title:Modern Physics Letters B
language:en
Short-container-title:Mod. Phys. Lett. B

Author:

LE DUC-ANH¹,HOANG ANH-TUAN²

Affiliation:

1. Department of Physics, Hanoi National University of Education, Xuan Thuy 136, Cau Giay, Hanoi 10000, Vietnam

2. Institute of Physics, 10 Dao Tan, Ba Dinh, Hanoi 10000, Vietnam

Abstract

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.

Publisher

World Scientific Pub Co Pte Lt

Subject

Condensed Matter Physics,Statistical and Nonlinear Physics

Link

https://www.worldscientific.com/doi/pdf/10.1142/S0217984911500163

Reference14 articles.

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