55 citations · 274 across the 17 of their papers we have counts for
17 papers
Thermal Hall conductivity of a valence bond solid phase in the square lattice - antiferromagnet Heisenberg model with a Dzyaloshinskii-Moriya interaction
Lucas S. Buzo, R. L. Doretto
We calculate the thermal Hall conductivity for the columnar valence-bond solid phase of a two-dimensional frustrated antiferromagnet. In particular, we consider the square…
Flat-band ferromagnetism in a correlated topological insulator on a honeycomb lattice
Leonardo S. G. Leite, R. L. Doretto
We study the flat-band ferromagnetic phase of a spinfull and time-reversal symmetric Haldane-Hubbard model on a honeycomb lattice within a bosonization formalism for flat-band Z$_2…
Flat-band ferromagnetism and spin waves in the Haldane-Hubbard model
Leonardo S. G. Leite, R. L. Doretto
We study the flat-band ferromagnetic phase of the Haldane-Hubbard model on a honeycomb lattice within a bosonization scheme for flat-band Chern insulators, focusing on the calculat…
Mean-field theory of interacting triplons in a two-dimensional valence-bond solid: stability and properties of many-triplon states
R. L. Doretto
We study a system of interacting triplons (the elementary excitations of a valence-bond solid) described by an effective interacting boson model derived within the bond-operator fo…
Entanglement entropy for the valence bond solid phases of two-dimensional dimerized Heisenberg antiferromagnets
Leonardo S. G. Leite, R. L. Doretto
We calculate the bipartite von Neumann and second Rényi entanglement entropies of the ground states of spin-1/2 dimerized Heisenberg antiferromagnets on a square lattice. Two disti…
Flat-band ferromagnetism in a topological Hubbard model
R. L. Doretto, M. O. Goerbig
We study the flat-band ferromagnetic phase of a topological Hubbard model within a bosonization formalism and, in particular, determine the spin-wave excitation spectrum. We consid…