461 citations · 1.9k across the 27 of their papers we have counts for
10 papers · 1 filter
Spiral order by disorder and lattice nematic order in a frustrated Heisenberg antiferromagnet on the honeycomb lattice
A. Mulder, R. Ganesh, L. Capriotti +1
Motivated by recent experiments on BiMnO(NO), we study a frustrated - Heisenberg model on the two dimensional (2D) honeycomb lattice. The classical $J_…
Comment on "Phase Diagram of an Asymmetric Spin Ladder."
Luca Capriotti, Federico Becca, Sandro Sorella +1
A comment to the paper by S. Chen, H. Büttner, and J. Voit, [Phys. Rev. Lett. {\bf 87}, 087205 (2001)].
Quantum Effects and Broken Symmetries in Frustrated Antiferromagnets
Luca Capriotti
We investigate the interplay between frustration and zero-point quantum fluctuations in the ground state of the triangular and Heisenberg antiferromagnets, using finite…
Quantum Phase Transition in Coupled Spin Ladders
Luca Capriotti, Federico Becca
The ground state of an array of coupled, spin-half, antiferromagnetic ladders is studied using spin-wave theory, exact diagonalization (up to 36 sites) and quantum Monte Carlo tech…
Superconductivity in the two-dimensional t-J model
S. Sorella, G. B. Martins, F. Becca +4
Using computational techniques, it is shown that pairing is a robust property of hole doped antiferromagnetic (AF) insulators. In one dimension (1D) and for two-leg ladder systems,…
Stripes and spin-incommensurabilities are favored by lattice anisotropies
Federico Becca, Luca Capriotti, Sandro Sorella
Structural distortions in cuprate materials give a natural origin for anisotropies in electron properties. We study a modified one-band t-J model in which we allow for different ho…
Resonating Valence Bond Wave Functions for Strongly Frustrated Spin Systems
Luca Capriotti, Federico Becca, Alberto Parola +1
The Resonating Valence Bond (RVB) theory for two-dimensional quantum antiferromagnets is shown to be the correct paradigm for large enough ``quantum frustration''. This scenario, p…
Exact bounds on the ground-state energy of the infinite-U Hubbard model
Federico Becca, Luca Capriotti, Sandro Sorella +1
We give upper and lower bounds for the ground-state energy of the infinite-U Hubbard model. In two dimensions, using these bounds we are able to rule out the possibility of phase s…
The Mott Metal-Insulator transition in the half-filled Hubbard model on the Triangular Lattice
Massimo Capone, Luca Capriotti, Federico Becca +1
We investigate the metal-insulator transition in the half-filled Hubbard model on a two-dimensional triangular lattice using both the Kotliar-Ruckenstein slave-boson technique, and…
Spontaneous plaquette dimerization in the Heisenberg model
Luca Capriotti, Sandro Sorella
We investigate the non magnetic phase of the spin-half frustrated Heisenberg antiferromagnet on the square lattice using exact diagonalization (up to 36 sites) and quantum Monte Ca…