scholarly journals Spatial inhomogeneity and strong correlation physics: A dynamical mean-field study of a model Mott-insulator–band-insulator heterostructure

2004 ◽  
Vol 70 (24) ◽  
Author(s):  
Satoshi Okamoto ◽  
Andrew J. Millis
Keyword(s):  
Field Study ◽  
Strong Correlation ◽  
Mean Field ◽  
Mott Insulator ◽  
Spatial Inhomogeneity ◽  
Band Insulator

scholarly journals A beyond mean-field study of the Tavis-Cummings model

2019 ◽  
Author(s):  
C. Tejera-Centeno ◽  
P. Pérez-Fernández ◽  
J. M. Arias
Keyword(s):  
Field Study ◽  
Mean Field

scholarly journals Collective Modes in Excitonic Magnets: Dynamical Mean-Field Study

2019 ◽  
Vol 122 (12) ◽  
Author(s):  
D. Geffroy ◽  
J. Kaufmann ◽  
A. Hariki ◽  
P. Gunacker ◽  
A. Hausoel ◽  
...  
Keyword(s):  
Field Study ◽  
Mean Field ◽  
Collective Modes

scholarly journals Low-temperature dielectric anomaly arising from electronic phase separation at the Mott insulator-metal transition

2021 ◽  
Vol 6 (1) ◽  
Author(s):  
A. Pustogow ◽  
R. Rösslhuber ◽  
Y. Tan ◽  
E. Uykur ◽  
A. Böhme ◽  
...  
Keyword(s):  
Phase Separation ◽  
Mean Field Theory ◽  
Mean Field ◽  
Coulomb Repulsion ◽  
Mott Insulator ◽  
Electronic Phase Separation ◽  
First Order Phase Transition ◽  
Electronic Phase ◽  
Insulator Metal Transition ◽  
First Order Phase

AbstractCoulomb repulsion among conduction electrons in solids hinders their motion and leads to a rise in resistivity. A regime of electronic phase separation is expected at the first-order phase transition between a correlated metal and a paramagnetic Mott insulator, but remains unexplored experimentally as well as theoretically nearby T = 0. We approach this issue by assessing the complex permittivity via dielectric spectroscopy, which provides vivid mapping of the Mott transition and deep insight into its microscopic nature. Our experiments utilizing both physical pressure and chemical substitution consistently reveal a strong enhancement of the quasi-static dielectric constant ε1 when correlations are tuned through the critical value. All experimental trends are captured by dynamical mean-field theory of the single-band Hubbard model supplemented by percolation theory. Our findings suggest a similar ’dielectric catastrophe’ in many other correlated materials and explain previous observations that were assigned to multiferroicity or ferroelectricity.

scholarly journals Band-insulator–metal–Mott-insulator transition in the half-filledt−t′ionic Hubbard chain

2007 ◽  
Vol 75 (24) ◽  
Author(s):  
G. I. Japaridze ◽  
R. Hayn ◽  
P. Lombardo ◽  
E. Müller-Hartmann
Keyword(s):  
Mott Insulator ◽  
Insulator Transition ◽  
Band Insulator
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