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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
전건상scopus
Issue Date
2011
Journal Title
Physical Review B - Condensed Matter and Materials Physics
ISSN
1098-0121JCR Link
Citation
vol. 84, no. 19
Indexed
SCI; SCIE; SCOPUS WOS scopus
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
Appears in Collections:
자연과학대학 > 물리학전공 > Journal papers
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