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Title: Effects of interaction strength, doping, and frustration on the antiferromagnetic phase of the two-dimensional Hubbard model

Journal Article · · Physical Review B
 [1];  [2];  [3];  [1];  [4]
  1. Univ. of London, Egham, Surrey (United Kingdom). Dept. of Physics, Royal Holloway
  2. Univ. de Sherbrooke, Sherbrooke, QC (Canada). Dept. de Physique, Institut Quantique, and Regroupement Quebecois sur les Materiaux de Pointe
  3. Brookhaven National Lab. (BNL), Upton, NY (United States). Computational Science Initiative
  4. Univ. de Sherbrooke, Sherbrooke, QC (Canada). Dept. de Physique, Institut Quantique, and Regroupement Quebecois sur les Materiaux de Pointe; Canadian Inst. for Advanced Research, Toronto, ON (Canada)

Recent quantum-gas microscopy of ultracold atoms and scanning tunneling microscopy of the cuprates reveal new detailed information about doped Mott antiferromagnets, which can be compared with calculations. Using cellular dynamical mean-field theory, we map out the antiferromagnetic (AF) phase of the two-dimensional Hubbard model as a function of interaction strength U, hole doping δ, and temperature T . The Néel phase boundary is nonmonotonic as a function of U and δ. Frustration induced by second-neighbor hopping reduces Néel order more effectively at small U. The doped AF is stabilized at large U by kinetic energy and at small U by potential energy. The transition between the AF insulator and the doped metallic AF is continuous. At large U, we find in-gap states similar to those observed in scanning tunneling microscopy. Finally, we predict that, contrary to the Hubbard bands, these states are only slightly spin polarized.

Research Organization:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Organization:
USDOE Office of Nuclear Energy (NE), International Nuclear Energy Policy and Cooperation
Grant/Contract Number:
SC0012704
OSTI ID:
1425185
Report Number(s):
BNL-203252-2018-JAAM; PRBMDO; TRN: US1802061
Journal Information:
Physical Review B, Vol. 96, Issue 24; ISSN 2469-9950
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 14 works
Citation information provided by
Web of Science

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Cited By (3)

Fermi surface evolution of the 2D Hubbard model within a novel four-pole approximation journal October 2018
Extended Crossover from a Fermi Liquid to a Quasiantiferromagnet in the Half-Filled 2D Hubbard Model journal January 2020
Extended crossover from Fermi liquid to quasi-antiferromagnet in the half-filled 2D Hubbard model text January 2018

Figures / Tables (3)