Phases of attractive spin-imbalanced fermions in square lattices
| Autor: | Shiwei Zhang, Simone Chiesa |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2013 |
| Předmět: |
Physics
Condensed Matter::Quantum Gases Strongly Correlated Electrons (cond-mat.str-el) Condensed matter physics FOS: Physical sciences Fermi surface Fermion 01 natural sciences Atomic and Molecular Physics and Optics Symmetry (physics) 010305 fluids & plasmas Momentum Supersolid Condensed Matter - Strongly Correlated Electrons Quantum Gases (cond-mat.quant-gas) Pairing 0103 physical sciences Wave vector 010306 general physics Condensed Matter - Quantum Gases Spin-½ |
| Popis: | We determine the relative stability of different ground-state phases of spin-imbalanced popula- tions of attractive fermions in square lattices. The phases are systematically characterized by the symmetry of the order parameter and the real- and momentum-space structures using Hartree- Fock-Bogoliubov theory. We find several type of unidirectional Larkin-Ovchinikov-type phases. We discuss the effect of commensuration between the ordering wave vector and the density imbalance, and describe the mechanism of Fermi surface reconstruction and pairing for various orders. A robust supersolid phase is shown to exist when the ordering wave vector is diagonally directed. 6.5 pages, 5 figures |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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