Broken discrete symmetries in a frustrated honeycomb antiferromagnet
We study the magnetic phase diagram of the J1-J2 Heisenberg antiferromagnet on a honeycomb lattice at the strongly frustrated point J2/J1=1/2 using large-scale Monte Carlo simulations. At low temperatures we find three different field regimes, each characterized by different broken discrete symmetri...
| Autores: | , , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2013 |
| País: | Argentina |
| Institución: | Consejo Nacional de Investigaciones Científicas y Técnicas |
| Repositorio: | CONICET Digital (CONICET) |
| Idioma: | inglés |
| OAI Identifier: | oai:ri.conicet.gov.ar:11336/23499 |
| Acceso en línea: | http://hdl.handle.net/11336/23499 |
| Access Level: | acceso abierto |
| Palabra clave: | HONEYCOMB LATTICE FRUSTRATED MAGNETISM PHASE TRANSITIONS https://purl.org/becyt/ford/1.3 https://purl.org/becyt/ford/1 |
| Sumario: | We study the magnetic phase diagram of the J1-J2 Heisenberg antiferromagnet on a honeycomb lattice at the strongly frustrated point J2/J1=1/2 using large-scale Monte Carlo simulations. At low temperatures we find three different field regimes, each characterized by different broken discrete symmetries. In low magnetic fields up to hc1/J1≈2.9 the Z3 rotational lattice symmetry is spontaneously broken while a 1/2-magnetization plateau is stabilized around hc2/J1=4. The collinear plateau state and the coplanar state in higher fields break the Z 4 translational symmetry and correspond to triple-q magnetic structures. The intermediate phase hc1<h<hc2 has an interesting symmetry structure, breaking simultaneously the Z3 and Z4 symmetries. At much lower temperatures the spatial broken discrete symmetries coexist with the quasi-long-range order of the transverse spin components. |
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