Doping-driven resistive collapse of the Mott insulator in a minimal model for VO 2
Abstract
Here we study the resistive collapse of the Mott insulator state in the dimer Hubbard model. This minimal model has been used to describe the physics of VO2, and should be relevant to other strongly correlated materials. It incorporates the physics of correlated dimers and the explicit competition between on-site Coulomb repulsion and magnetic exchange interactions. Our results unveil that between the Mott insulator at half filling and the Fermi liquid metal at high doping there is an intermediate bad metallic phase with exotic features such as a pseudogap, orbital selectivity, and a first-order metal-metal transition. The model is solved within dynamical mean field theory by means of quantum Monte Carlo, which provides the numerically exact solution of the model in the limit of large lattice dimensionality. This model can be considered as a minimal one that captures exotic phenomena associated to the physics of a doped Mott insulator, shading light on their basic physical mechanism.
- Authors:
-
[1];
[1];
[1]
- Université Paris-Saclay, Orsay (France)
- Universidad de Buenos Aires (Argentina)
- Publication Date:
- Research Org.:
- Univ. of California, San Diego, CA (United States); Université Paris-Saclay, Orsay (France)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES); National Scientific and Technical Research Council (CONICET); National Agency for Scientific and Technological Promotion (ANPCyT); UBACYT; French National Research Agency (ANR)
- OSTI Identifier:
- 1979739
- Grant/Contract Number:
- SC0019273
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physical Review. B
- Additional Journal Information:
- Journal Volume: 105; Journal Issue: 12; Journal ID: ISSN 2469-9950
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; Metal-insulator transition; strongly correlated systems; dynamical mean field theory
Citation Formats
Fratino, L., Bag, S., Camjayi, A., Civelli, M., and Rozenberg, M. Doping-driven resistive collapse of the Mott insulator in a minimal model for VO2. United States: N. p., 2022.
Web. doi:10.1103/physrevb.105.125140.
Fratino, L., Bag, S., Camjayi, A., Civelli, M., & Rozenberg, M. Doping-driven resistive collapse of the Mott insulator in a minimal model for VO2. United States. https://doi.org/10.1103/physrevb.105.125140
Fratino, L., Bag, S., Camjayi, A., Civelli, M., and Rozenberg, M. Wed .
"Doping-driven resistive collapse of the Mott insulator in a minimal model for VO2". United States. https://doi.org/10.1103/physrevb.105.125140. https://www.osti.gov/servlets/purl/1979739.
@article{osti_1979739,
title = {Doping-driven resistive collapse of the Mott insulator in a minimal model for VO2},
author = {Fratino, L. and Bag, S. and Camjayi, A. and Civelli, M. and Rozenberg, M.},
abstractNote = {Here we study the resistive collapse of the Mott insulator state in the dimer Hubbard model. This minimal model has been used to describe the physics of VO2, and should be relevant to other strongly correlated materials. It incorporates the physics of correlated dimers and the explicit competition between on-site Coulomb repulsion and magnetic exchange interactions. Our results unveil that between the Mott insulator at half filling and the Fermi liquid metal at high doping there is an intermediate bad metallic phase with exotic features such as a pseudogap, orbital selectivity, and a first-order metal-metal transition. The model is solved within dynamical mean field theory by means of quantum Monte Carlo, which provides the numerically exact solution of the model in the limit of large lattice dimensionality. This model can be considered as a minimal one that captures exotic phenomena associated to the physics of a doped Mott insulator, shading light on their basic physical mechanism.},
doi = {10.1103/physrevb.105.125140},
journal = {Physical Review. B},
number = 12,
volume = 105,
place = {United States},
year = {Wed Mar 30 00:00:00 EDT 2022},
month = {Wed Mar 30 00:00:00 EDT 2022}
}
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