Quantum Monte Carlo study of the two-dimensional ferromagnet

Article

关键词: ITINERANT FERROMAGNETISM;    ZERO-TEMPERATURE;    ELECTRON-GAS;    HARD-SPHERE;    FERMI GAS;    SUPERCONDUCTIVITY;    MOLECULES;    UGE2;   

DOI  :  10.1103/PhysRevB.87.184414

来源: SCIE

【 摘 要 】

We present quantum Monte Carlo calculations that probe the paramagnet-ferromagnet phase transition in a two-dimensional Stoner Hamiltonian. With a screened Coulomb interaction we observe a first-order ferromagnetic transition for short screening lengths, and a second-order transition with a longer screening length, accompanied by a rising critical interaction strength. Finally, we discuss the consequences of our results for an ultracold atomic gas with finite ranged interactions.

【 授权许可】

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