English

Magnetic phase diagram of the three-dimensional doped Hubbard model

Strongly Correlated Electrons 2025-02-14 v1

Abstract

We establish the phase diagram of the Hubbard model on a cubic lattice for a wide range of temperatures, dopings and interaction strengths, considering both commensurate and incommensurate magnetic orders. We use the dynamical mean-field theory together with an efficient method to compute the free energy which enable the determination of the correct ordering vectors. Besides an antiferromagnetic state close to half-filling, we identify a number of different magnetic spiral phases with ordering vectors (q,π,π)(q,\pi,\pi), (q,q,π)(q,q,\pi) and (q,q,q)(q,q,q) as well as a region with close competition between them, hinting at spatial phase separation or at the onset of a stripe phase. Additionally, we extensively study several thermodynamic properties with direct relevance to cold-atom experiments: the entropy, energy and double-occupancy.

Keywords

Cite

@article{arxiv.2409.08848,
  title  = {Magnetic phase diagram of the three-dimensional doped Hubbard model},
  author = {Liam Rampon and Fedor Šimkovic and Michel Ferrero},
  journal= {arXiv preprint arXiv:2409.08848},
  year   = {2025}
}