Extended Crossover from a Fermi Liquid to a Quasiantiferromagnet in the Half-Filled 2D Hubbard Model
| Autor: | Evgeny Kozik, James P.F. LeBlanc, Youjin Deng, Aaram J. Kim, Fedor Simkovic, Nikolay Prokof'ev, Boris Svistunov |
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| Rok vydání: | 2020 |
| Předmět: |
Condensed Matter::Quantum Gases
Physics Strongly Correlated Electrons (cond-mat.str-el) Hubbard model Condensed matter physics Monte Carlo method Crossover FOS: Physical sciences General Physics and Astronomy Fermi surface 01 natural sciences Square lattice Condensed Matter - Strongly Correlated Electrons 0103 physical sciences Thermodynamic limit Condensed Matter::Strongly Correlated Electrons Fermi liquid theory 010306 general physics Ground state |
| Zdroj: | Simkovic, F, LeBlanc, J, Kim, A J, Deng, Y, Prokof'ev, N, Svistunov, B & Kozik, E 2020, ' Extended Crossover from a Fermi Liquid to a Quasiantiferromagnet in the Half-Filled 2D Hubbard Model ', Physical Review Letters, vol. 124, no. 1, 017003 . https://doi.org/10.1103/PhysRevLett.124.017003 |
| ISSN: | 1079-7114 0031-9007 |
| DOI: | 10.1103/physrevlett.124.017003 |
| Popis: | The ground state of the Hubbard model with nearest-neighbor hopping on the square lattice at half filling is known to be that of an antiferromagnetic (AFM) band insulator for any on-site repulsion. At finite temperature, the absence of long-range order makes the question of how the interaction-driven insulator is realized nontrivial. We address this problem with controlled accuracy in the thermodynamic limit using self-energy diagrammatic determinant Monte Carlo and dynamical cluster approximation methods and show that development of long-range AFM correlations drives an extended crossover from Fermi liquid to insulating behavior in the parameter regime that precludes a metal-to-insulator transition. The intermediate crossover state is best described as a non-Fermi liquid with a partially gapped Fermi surface. 6 pages, 4 figures, with supplemental material: 2 pages, 3 figures |
| Databáze: | OpenAIRE |
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