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cond-mat.str-el2025
Spin-spiral instability of the Nagaoka ferromagnet in the crossover between square and triangular lattices
Darren Pereira, Erich J. Mueller
We study the hard-core Fermi-Hubbard model in the crossover between square and triangular lattices near half-filling. As was recognized by Nagaoka in the 1960s, on the square latti…
cond-mat.str-el2025★ 5 cited
Kinetic magnetism in the crossover between the square and triangular lattice Fermi-Hubbard models
Darren Pereira, Erich J. Mueller
We calculate the spin correlations that result from the motion of a single dopant in the hard-core Fermi-Hubbard model, as the geometry evolves from a square to a triangular lattic…
cond-mat.str-el2021★ 13 cited
Dynamics of Spin Helices in the One-Dimensional Model
Darren Pereira, Erich J. Mueller
Motivated by cold-atom experiments and a desire to understand far-from-equilibrium quantum transport, we analytically study the dynamics of spin helices in the one-dimensional …