TY - JOUR
T1 - Superfluid ground state phase diagram of the two-dimensional Hubbard model in the emergent Bardeen-Cooper-Schrieffer regime
AU - Simkovic, Fedor
AU - Deng, Youjin
AU - Kozik, Evgeny
N1 - Funding Information:
Engineering and Physical Sciences Research Council Simons Foundation National Natural Science Foundation of China Ministry of Science and Technology of the People's Republic of China
Funding Information:
We are grateful to A. Chubukov, B. Svistunov, and N. Prokofiev for discussions of the results and X.-W. Liu for his help with data aggregation. This work was supported by the EPSRC through Grant No. EP/P003052/1 and the Simons Foundation as a part of the Simons Collaboration on the Many-Electron Problem. Y.D. acknowledges the support from National Natural Science Foundation of China (Grant No. 11625522) and the Ministry of Science and Technology of China (Grant No. 2018YFA0306501).
Publisher Copyright:
© 2021 American Physical Society
Copyright:
Copyright 2021 Elsevier B.V., All rights reserved.
PY - 2021/7/20
Y1 - 2021/7/20
N2 - In nonperturbative regimes, the superfluid instability in the two-dimensional (2D) Hubbard model can be described by an emergent BCS theory with small effective pairing constants. We compute the effective couplings using a controlled bold-line diagrammatic Monte Carlo approach, which stochastically sums all skeleton Feynman diagrams dressed in the one- and two-particle channels to high expansion orders, and map out the resulting superfluid ground-state phase diagram in a range of next-nearest-neighbor hopping , interaction strength , and lattice filling . The phase diagram is dramatically transformed in the hole-doped region and becomes particularly rich at larger doping and . At , the weak-coupling picture with the dominant triplet pairing sharply peaked at due to the Van Hove singularity is replaced by a plateau of the singlet paring, while for the effective couplings are consistent with the high-temperature superconductivity in the hole-doped region near cuprates' optimal doping.
AB - In nonperturbative regimes, the superfluid instability in the two-dimensional (2D) Hubbard model can be described by an emergent BCS theory with small effective pairing constants. We compute the effective couplings using a controlled bold-line diagrammatic Monte Carlo approach, which stochastically sums all skeleton Feynman diagrams dressed in the one- and two-particle channels to high expansion orders, and map out the resulting superfluid ground-state phase diagram in a range of next-nearest-neighbor hopping , interaction strength , and lattice filling . The phase diagram is dramatically transformed in the hole-doped region and becomes particularly rich at larger doping and . At , the weak-coupling picture with the dominant triplet pairing sharply peaked at due to the Van Hove singularity is replaced by a plateau of the singlet paring, while for the effective couplings are consistent with the high-temperature superconductivity in the hole-doped region near cuprates' optimal doping.
UR - http://www.scopus.com/inward/record.url?scp=85111671077&partnerID=8YFLogxK
U2 - 10.1103/PhysRevB.104.L020507
DO - 10.1103/PhysRevB.104.L020507
M3 - Article
SN - 1098-0121
VL - 104
SP - L020507
JO - Physical Review B (Condensed Matter and Materials Physics)
JF - Physical Review B (Condensed Matter and Materials Physics)
IS - 2
M1 - L020507
ER -