Hubbard bands, Mott transition and deconfinement in strongly correlated systems

The problem of deconfinement phases in strongly correlated systems is discussed. In space-time dimension \(d=3+1\), a competition of confinement and Coulomb phases occurs, but in \(d=2+1\) the confining phase dominates owing to monopole proliferation, but gapless fermion excitations can change the s...

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Bibliographic Details
Published in:arXiv.org 2023-01
Main Author: V Yu Irkhin
Format: Article
Language:English
Subjects:
Fermi surfaces
Fermions
Insulation
Spin liquid
Online Access:Get full text
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Summary:The problem of deconfinement phases in strongly correlated systems is discussed. In space-time dimension \(d=3+1\), a competition of confinement and Coulomb phases occurs, but in \(d=2+1\) the confining phase dominates owing to monopole proliferation, but gapless fermion excitations can change the situation. Combining the Kotliar-Ruckenstein representation and fractionalized spin-liquid deconfinement picture, the Mott transition and Hubbard subbands are treated, general expressions in the case of an arbitrary bare band spectrum being obtained. The transition into a metallic state is determined by condensation of a gapless boson mode. The spectrum picture in the insulating state is considerably influenced by the spinon spin-liquid spectrum and hidden Fermi surface.
ISSN:2331-8422
DOI:10.48550/arxiv.2301.10589