Specific heat maximum as a signature of Mott physics in the two-dimensional Hubbard model. / Sordi, Giovanni; Walsh, Caitlin; Semon, P.; Tremblay, A. -M. S.

In: Physical Review B, Vol. 100, No. 12, 121105(R), 12.09.2019, p. 1-6.

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Specific heat maximum as a signature of Mott physics in the two-dimensional Hubbard model. / Sordi, Giovanni; Walsh, Caitlin; Semon, P.; Tremblay, A. -M. S.

In: Physical Review B, Vol. 100, No. 12, 121105(R), 12.09.2019, p. 1-6.

Research output: Contribution to journalArticlepeer-review

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Sordi, Giovanni ; Walsh, Caitlin ; Semon, P. ; Tremblay, A. -M. S. / Specific heat maximum as a signature of Mott physics in the two-dimensional Hubbard model. In: Physical Review B. 2019 ; Vol. 100, No. 12. pp. 1-6.

BibTeX

@article{9c6ddf824db44dc0a87a16bd87137476,
title = "Specific heat maximum as a signature of Mott physics in the two-dimensional Hubbard model",
abstract = "Recent experiments on cuprates show that as a function of doping, the normal-state specific heat sharply peaks at the doping $\delta^*$, where the pseudogap ends at low temperature. This finding is taken as the thermodynamic signature of a quantum critical point, whose nature has not yet been identified. Here we present calculations for the two-dimensional Hubbard model in the doped Mott insulator regime, which indicate that the specific heat anomaly can arise from the finite temperature critical endpoint of a first-order transition between a pseudogap phase with dominant singlet correlations and a metal. As a function of doping at the temperature of the endpoint, the specific heat diverges. Upon increasing temperature, the peak becomes broader. The diverging correlation length is associated with uniform density fluctuations. No broken symmetries are needed. These anomalies also occur at half-filling as a function of interaction strength, and are relevant for organic superconductors and ultracold atoms.",
author = "Giovanni Sordi and Caitlin Walsh and P. Semon and Tremblay, {A. -M. S.}",
year = "2019",
month = sep,
day = "12",
doi = "10.1103/PhysRevB.100.121105",
language = "English",
volume = "100",
pages = "1--6",
journal = "Physical Review B",
issn = "1098-0121",
publisher = "American Physical Society",
number = "12",

}

RIS

TY - JOUR

T1 - Specific heat maximum as a signature of Mott physics in the two-dimensional Hubbard model

AU - Sordi, Giovanni

AU - Walsh, Caitlin

AU - Semon, P.

AU - Tremblay, A. -M. S.

PY - 2019/9/12

Y1 - 2019/9/12

N2 - Recent experiments on cuprates show that as a function of doping, the normal-state specific heat sharply peaks at the doping $\delta^*$, where the pseudogap ends at low temperature. This finding is taken as the thermodynamic signature of a quantum critical point, whose nature has not yet been identified. Here we present calculations for the two-dimensional Hubbard model in the doped Mott insulator regime, which indicate that the specific heat anomaly can arise from the finite temperature critical endpoint of a first-order transition between a pseudogap phase with dominant singlet correlations and a metal. As a function of doping at the temperature of the endpoint, the specific heat diverges. Upon increasing temperature, the peak becomes broader. The diverging correlation length is associated with uniform density fluctuations. No broken symmetries are needed. These anomalies also occur at half-filling as a function of interaction strength, and are relevant for organic superconductors and ultracold atoms.

AB - Recent experiments on cuprates show that as a function of doping, the normal-state specific heat sharply peaks at the doping $\delta^*$, where the pseudogap ends at low temperature. This finding is taken as the thermodynamic signature of a quantum critical point, whose nature has not yet been identified. Here we present calculations for the two-dimensional Hubbard model in the doped Mott insulator regime, which indicate that the specific heat anomaly can arise from the finite temperature critical endpoint of a first-order transition between a pseudogap phase with dominant singlet correlations and a metal. As a function of doping at the temperature of the endpoint, the specific heat diverges. Upon increasing temperature, the peak becomes broader. The diverging correlation length is associated with uniform density fluctuations. No broken symmetries are needed. These anomalies also occur at half-filling as a function of interaction strength, and are relevant for organic superconductors and ultracold atoms.

U2 - 10.1103/PhysRevB.100.121105

DO - 10.1103/PhysRevB.100.121105

M3 - Article

VL - 100

SP - 1

EP - 6

JO - Physical Review B

JF - Physical Review B

SN - 1098-0121

IS - 12

M1 - 121105(R)

ER -