期刊
PHYSICAL REVIEW B
卷 83, 期 19, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.83.195429
关键词
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资金
- Leverhulme Trust
- UK Engineering and Physical Sciences Research Council (EPSRC)
- Engineering and Physical Sciences Research Council [EP/F032773/1] Funding Source: researchfish
- EPSRC [EP/F032773/1] Funding Source: UKRI
Motivated by potential realizations in cold-atom or cold-molecule systems, we have performed quantum Monte Carlo simulations of two-component gases of fermions in two dimensions with hard-core interactions. We have determined the gross features of the zero-temperature phase diagram by investigating the relative stabilities of paramagnetic and ferromagnetic fluids and crystals. We have also examined the effect of including a pairwise, long-range r(-3) potential between the particles. Our most important conclusion is that there is no region of stability for a ferromagnetic fluid phase, even if the long-range interaction is present. We also present results for the pair-correlation function, static structure factor, and momentum density of two-dimensional hard-core fluids.
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