Modeling Unconventional Superconductivity at the Crossover between Strong and Weak Electronic Interactions
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Modeling Unconventional Superconductivity at the Crossover between Strong and Weak Electronic Interactions. / Christensen, Morten H.; Wang, Xiaoyu; Schattner, Yoni; Berg, Erez; Fernandes, Rafael M.
In: Physical Review Letters, Vol. 125, No. 24, 247001, 07.12.2020.Research output: Contribution to journal › Journal article › Research › peer-review
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TY - JOUR
T1 - Modeling Unconventional Superconductivity at the Crossover between Strong and Weak Electronic Interactions
AU - Christensen, Morten H.
AU - Wang, Xiaoyu
AU - Schattner, Yoni
AU - Berg, Erez
AU - Fernandes, Rafael M.
N1 - Publisher Copyright: © 2020 American Physical Society.
PY - 2020/12/7
Y1 - 2020/12/7
N2 - High-temperature superconductivity emerges in many different quantum materials, often in regions of the phase diagram where the electronic kinetic energy is comparable to the electron-electron repulsion. Describing such intermediate-coupling regimes has proven challenging as standard perturbative approaches are inapplicable. Here, we employ quantum Monte Carlo methods to solve a multiband Hubbard model that does not suffer from the sign problem and in which only repulsive interband interactions are present. In contrast to previous sign-problem-free studies, we treat magnetic, superconducting, and charge degrees of freedom on an equal footing. We find an antiferromagnetic dome accompanied by a metal-to-insulator crossover line in the intermediate-coupling regime, with a smaller superconducting dome appearing in the metallic region. Across the antiferromagnetic dome, the magnetic fluctuations change from overdamped in the metallic region to propagating in the insulating region. Our findings shed new light on the intertwining between superconductivity, magnetism, and charge correlations in quantum materials.
AB - High-temperature superconductivity emerges in many different quantum materials, often in regions of the phase diagram where the electronic kinetic energy is comparable to the electron-electron repulsion. Describing such intermediate-coupling regimes has proven challenging as standard perturbative approaches are inapplicable. Here, we employ quantum Monte Carlo methods to solve a multiband Hubbard model that does not suffer from the sign problem and in which only repulsive interband interactions are present. In contrast to previous sign-problem-free studies, we treat magnetic, superconducting, and charge degrees of freedom on an equal footing. We find an antiferromagnetic dome accompanied by a metal-to-insulator crossover line in the intermediate-coupling regime, with a smaller superconducting dome appearing in the metallic region. Across the antiferromagnetic dome, the magnetic fluctuations change from overdamped in the metallic region to propagating in the insulating region. Our findings shed new light on the intertwining between superconductivity, magnetism, and charge correlations in quantum materials.
UR - http://www.scopus.com/inward/record.url?scp=85097582384&partnerID=8YFLogxK
U2 - 10.1103/PhysRevLett.125.247001
DO - 10.1103/PhysRevLett.125.247001
M3 - Journal article
C2 - 33412040
AN - SCOPUS:85097582384
VL - 125
JO - Physical Review Letters
JF - Physical Review Letters
SN - 0031-9007
IS - 24
M1 - 247001
ER -
ID: 398067919