265 citations · 2k across the 46 of their papers we have counts for
4 papers · 1 filter
Chiral Y junction of quantum spin chains
F. Buccheri, R. Egger, R. G. Pereira +1
We study a Y junction of spin-1/2 Heisenberg chains with an interaction that breaks both time-reversal and chain exchange symmetries, but not their product nor SU(2) symmetry. The…
Kondo effect in a parity-time-symmetric non-Hermitian Hamiltonian
Jose A. S. Lourenco, Ronivon L. Eneias, Rodrigo G. Pereira
The combination of non-Hermitian physics and strong correlations can give rise to new effects in open quantum many-body systems with balanced gain and loss. We propose a generalize…
Dynamical structure factors in the nematic phase of frustrated ferromagnetic spin chains
Flávia B. Ramos, Sebas Eliëns, Rodrigo G. Pereira
Frustrated spin systems can show phases with spontaneous breaking of spin-rotational symmetry without the formation of local magnetic order. We study the dynamic response of the sp…
SU(4)-symmetric spin-orbital liquids on the hyperhoneycomb lattice
Willian M. H. Natori, Eric C. Andrade, Rodrigo G. Pereira
We study the effective spin-orbital model that describes the magnetism of 4 or 5 Mott insulators in ideal tricoordinated lattices. In the limit of vanishing Hund's coupli…