| Texto completo | |
| Autor(es): |
Consoli, Pedro M.
;
Janssen, Lukas
;
Vojta, Matthias
;
Andrade, Eric C.
Número total de Autores: 4
|
| Tipo de documento: | Artigo Científico |
| Fonte: | PHYSICAL REVIEW B; v. 102, n. 15, p. 21-pg., 2020-10-22. |
| Resumo | |
The exact solution of Kitaev's spin-1/2 honeycomb spin-liquid model has sparked an intense search for Mott insulators hosting bond-dependent Kitaev interactions, of which Na2IrO3 and alpha-RuCl3 are prime examples. Subsequently, it has been proposed that also spin-1 and spin-3/2 analogs of Kitaev interactions may occur in materials with strong spin-orbit coupling. As a minimal model to describe these Kitaev materials, we study the Heisenberg-Kitaev Hamiltonian in a consistent 1/S expansion, with S being the spin size. We present a comprehensive study of this model in the presence of an external magnetic field applied along two different directions, [001] and [111], for which an intricate classical phase diagram has been reported. In both settings, we employ spin-wave theory in a number of ordered phases to compute phase boundaries at the next-to-leading order in 1/S and show that quantum corrections substantially modify the classical phase diagram. More broadly, our work presents a consistent route to investigate the leading quantum corrections in spin models that break spin-rotational symmetry. (AU) | |
| Processo FAPESP: | 19/02099-0 - Derretendo o cristal de vórtices no modelo de Heisenberg-Kitaev em um campo magnético |
| Beneficiário: | Pedro Monteiro Cônsoli |
| Modalidade de apoio: | Bolsas no Exterior - Estágio de Pesquisa - Mestrado |
| Processo FAPESP: | 19/17026-9 - Magnetos frustrados: anisotropia e inomogeneidades |
| Beneficiário: | Eric de Castro e Andrade |
| Modalidade de apoio: | Auxílio à Pesquisa - Regular |
| Processo FAPESP: | 17/22133-3 - Derretendo o cristal de vórtices no modelo de Heisenberg-Kitaev em um campo magnético |
| Beneficiário: | Pedro Monteiro Cônsoli |
| Modalidade de apoio: | Bolsas no Brasil - Mestrado |