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자연과학대학
물리학전공
Journal papers
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Phase transitions and spectral properties of the ionic Hubbard model in one dimension
Title
Phase transitions and spectral properties of the ionic Hubbard model in one dimension
Authors
Go A.
;
Jeon G.S.
Ewha Authors
전건상
SCOPUS Author ID
전건상
Issue Date
2011
Journal Title
Physical Review B - Condensed Matter and Materials Physics
ISSN
1098-0121
Citation
Physical Review B - Condensed Matter and Materials Physics vol. 84, no. 19
Indexed
SCI; SCIE; SCOPUS
Document Type
Article
Abstract
The ionic Hubbard model is investigated at half filling at zero temperature. We apply the cellular dynamical mean-field theory to the one-dimensional ionic Hubbard model to compute local quantities such as double occupancy and staggered charge density. Both quantities provide general transition behavior of the model from a band insulating phase to a Mott insulating phase. The renormalized band gap is introduced as an efficient order parameter for the transition from a band insulator. We also present the spectral properties of the ionic Hubbard model, which exhibit characteristic features for both weak and strong interactions. © 2011 American Physical Society.
DOI
10.1103/PhysRevB.84.195102
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