47 citations · 189 across the 8 of their papers we have counts for
5 papers · 1 filter
Phase diagram of the spin-1 Heisenberg model with three-site interactions on the square lattice
F. Michaud, F. Mila
We study the spin S=1 antiferromagnetic Heisenberg model on the square lattice with, in addition to the nearest-neighbor interaction, a three-site interaction of the form (S_i S_j)…
Exact Ground States of Frustrated Spin-1 Ising-Heisenberg and Heisenberg Ladders in a Magnetic Field
Jozef Strecka, Frederic Michaud, Frederic Mila
Ground states of the frustrated spin-1 Ising-Heisenberg two-leg ladder with Heisenberg intra-rung coupling and only Ising interaction along legs and diagonals are rigorously found…
Berry phase investigation of spin-S ladders
Natalia Chepiga, Frédéric Michaud, Frédéric Mila
We investigate the properties of antiferromagnetic spin-S ladders with the help of local Berry phases defined by imposing a twist on one or a few local bonds. In gapped systems wit…
Realization of higher Wess-Zumino-Witten models in spin chains
Frédéric Michaud, Salvatore R. Manmana, Frédéric Mila
Building on the generalization of the exactly dimerized Majumdar-Ghosh ground state to arbitrary spin S for the Heisenberg chain with a three-site term (S_{i-1} S_i)(S_i S_{i+1}) +…
Intermediate magnetization plateaus in the spin-1/2 Ising-Heisenberg and Heisenberg models on two-dimensional triangulated lattices
Jana Cisarova, Frederic Michaud, Frederic Mila +1
The ground state and zero-temperature magnetization process of the spin-1/2 Ising-Heisenberg model on two-dimensional triangles-in-triangles lattices is exactly calculated using ei…