| Texto completo | |
| Autor(es): |
de Farias, Carlene S.
;
de Carvalho, Vanuildo S.
;
Miranda, Eduardo
;
Pereira, Rodrigo G.
Número total de Autores: 4
|
| Tipo de documento: | Artigo Científico |
| Fonte: | PHYSICAL REVIEW B; v. 102, n. 7, p. 16-pg., 2020-08-07. |
| Resumo | |
We propose an exactly solvable model for J(eff) = 3/2 alocal moments on the honeycomb lattice. Our construction is guided by a symmetry analysis and by the requirement of an exact solution in terms of a Majorana fermion representation for multipole operators. The main interaction in the model can be interpreted as a bond-dependent quadrupole-quadrupole interaction. When time reversal symmetry is explicitly broken, we obtain a gapped spin liquid with a single chiral Majorana edge mode. We also investigate another solvable model in which the time-reversal-invariant spin liquid is coupled to conduction electrons in a superconductor. In the presence of a Kondo-like coupling that involves the octupole moment of the localized spins, the itinerant electrons hybridize with the emergent Majorana fermions in the spin liquid. This leads to spontaneous time reversal symmetry breaking and generates odd-frequency pairing. Our results suggest that J(eff) = 3/2 asystems with strong quadrupole-quadrupole interactions may provide a route towards non-Abelian quantum spin liquids and unconventional superconductivity. (AU) | |
| Processo FAPESP: | 16/05069-7 - Estudo de propriedades de transporte de modelos de baixa energia relevantes para os cupratos supercondutores e líquidos de spin quânticos |
| Beneficiário: | Vanuildo Silva de Carvalho |
| Modalidade de apoio: | Bolsas no Brasil - Pós-Doutorado |