Fulde-Ferrell-Larkin-Ovchinnikov pairing as leading instability on the square lattice
| Autor: | Jan Gukelberger, Sebastian Lienert, Matthias Troyer, Evgeny Kozik, Lode Pollet |
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| Rok vydání: | 2016 |
| Předmět: |
Population
FOS: Physical sciences 01 natural sciences 7. Clean energy 010305 fluids & plasmas Superconductivity (cond-mat.supr-con) Superfluidity Condensed Matter - Strongly Correlated Electrons Condensed Matter::Superconductivity Quantum mechanics 0103 physical sciences 010306 general physics education Spin-½ Condensed Matter::Quantum Gases Physics education.field_of_study Strongly Correlated Electrons (cond-mat.str-el) Condensed matter physics Condensed Matter - Superconductivity Fermion Square lattice Quantum Gases (cond-mat.quant-gas) Pairing Fermi liquid theory Cooper pair Condensed Matter - Quantum Gases |
| Zdroj: | Physical Review B. 94 |
| ISSN: | 2469-9969 2469-9950 |
| Popis: | We study attractively interacting spin-1/2 fermions on the square lattice subject to a spin population imbalance. Using unbiased diagrammatic Monte Carlo simulations we find an extended region in the parameter space where the Fermi liquid is unstable towards formation of Cooper pairs with non-zero center-of-mass momentum, known as the Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) state. In contrast to earlier mean-field and quasi-classical studies we provide quantitative and well-controlled predictions on the existence and location of the relevant Fermi-liquid instabilities. The highest temperature where the FFLO instability can be observed is about half of the superfluid transition temperature in the unpolarized system. Comment: 7 pages, 4 figures; v2: improved references and discussion, added calculations with larger cutoff order that corroborate our earlier results |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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