47 citations · 189 across the 8 of their papers we have counts for
8 papers
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…
Antiferromagnetic spin-S chains with exactly dimerized ground states
Frédéric Michaud, François Vernay, Salvatore R. Manmana +1
We show that spin S Heisenberg spin chains with an additional three-body interaction of the form (S_{i-1}S_{i})(S_{i}S_{i+1})+h.c. possess fully dimerized ground states if the rati…
Theory of inelastic light scattering in spin-1 systems: resonant regimes and detection of quadrupolar order
Frédéric Michaud, François Vernay, Frédéric Mila
Motivated by the lack of an obvious spectroscopic probe to investigate non-conventional order such as quadrupolar orders in spin S>1/2 systems, we present a theoretical approach to…
Frustration induced plateaux in S>=1/2 Heisenberg spin ladders
F. Michaud, T. Coletta, S. R. Manmana +2
We study the T = 0 magnetization of frustrated two-leg spin ladders with arbitrary value of the spin S. In the strong rung limit, we use degenerate perturbation theory to prove tha…