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Nonequilibrium thermal state of a voltage-biased Mott insulator
- Source :
- Phys. Rev. B 105, 075149 (2022)
- Publication Year :
- 2020
-
Abstract
- We establish the nonequilibrium thermal phases of a voltage driven antiferromagnetic Mott insulator in three dimensions, realised at steady state under a voltage bias. Starting from the Keldysh action for the half filled Hubbard model we derive an effective Langevin equation for the `slow' magnetic variables. The coupling of electrons to these degrees of freedom determine the transport properties. At low temperature we find a voltage-driven discontinuous insulator-metal transition, along with hysteresis. We map the suppression of the N\'eel temperature $T_N$ and pseudogap temperature $T_{pg}$ with increasing voltage, and discover that the biased Mott insulator has a finite temperature insulator-metal transition. The low temperature results resolve an experimental puzzle about hysteresis, and the thermal results make testable predictions on spectra and nonlinear transport.<br />Comment: 12 pages, 11 figures. Supplement 5 pages, 1 figure
- Subjects :
- Condensed Matter - Strongly Correlated Electrons
Subjects
Details
- Database :
- arXiv
- Journal :
- Phys. Rev. B 105, 075149 (2022)
- Publication Type :
- Report
- Accession number :
- edsarx.2009.04533
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.1103/PhysRevB.105.075149