Quantum Monte Carlo study of the two-dimensional ferromagnet
arXiv:1305.1198 · doi:10.1103/PhysRevB.87.184414
Abstract
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.
Accepted for publication in Phys. Rev. B
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- Itinerant ferromagnetism of two-dimensional repulsive fermions with Rabi coupling
- Polarization in a three-dimensional Fermi gas with Rabi coupling
- Magnetic properties of spin-1/2 Fermi gases with ferromagnetic interaction
- Phase Transitions of Repulsive Two-Component Fermi Gases in Two Dimensions
- Stoner-type theory of Magnetism in Silicon MOSFETs