Holon-doublon binding as the mechanism for the Mott transition

Prelovsek, Peter, Kokalj, Jure, Lenarcic, Zala and McKenzie, Ross H. (2015) Holon-doublon binding as the mechanism for the Mott transition. Physical Review B - Condensed Matter and Materials Physics, 92 235155: . doi:10.1103/PhysRevB.92.235155

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Author Prelovsek, Peter
Kokalj, Jure
Lenarcic, Zala
McKenzie, Ross H.
Title Holon-doublon binding as the mechanism for the Mott transition
Journal name Physical Review B - Condensed Matter and Materials Physics   Check publisher's open access policy
ISSN 1550-235X
Publication date 2015-12-31
Year available 2015
Sub-type Article (original research)
DOI 10.1103/PhysRevB.92.235155
Open Access Status File (Publisher version)
Volume 92
Issue 235155
Total pages 6
Place of publication College Park, MD, United States
Publisher American Physical Society
Collection year 2016
Language eng
Abstract We study the binding of a holon to a doublon in a half-filled Hubbard model as the mechanism of the zero-temperature metal-insulator transition. In a spin polarized system a single holon-doublon (HD) pair exhibits a binding transition on a 3D lattice, or a sharp crossover on a 2D lattice, corresponding well to the standard Mott transition in unpolarized systems. We extend the HD-pair study towards nonpolarized systems by considering more general spin background and by treating the finite HD density within a BCS-type approximation. Both approaches lead to a discontinuous transition away from the fully polarized system and give density correlations consistent with numerical results on a triangular lattice.
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Q-Index Status Provisional Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Mathematics and Physics
Official 2016 Collection
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