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 symmetr...

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Detalles Bibliográficos
Autores principales: Rosales, Héctor Diego, Cabra, Daniel Carlos, Lamas, Carlos Alberto, Pujol, P., Zhitomirsky, M. E.
Formato: Articulo Preprint
Lenguaje:Inglés
Publicado: 2013
Materias:
Física
Honeycomb lattice
Frustrated magnetism
Phase transitions
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/99086
https://ri.conicet.gov.ar/11336/23499
https://journals.aps.org/prb/abstract/10.1103/PhysRevB.87.104402
https://arxiv.org/abs/1208.2416
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-99086
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Física
Honeycomb lattice
Frustrated magnetism
Phase transitions
spellingShingle Física
Honeycomb lattice
Frustrated magnetism
Phase transitions
Rosales, Héctor Diego
Cabra, Daniel Carlos
Lamas, Carlos Alberto
Pujol, P.
Zhitomirsky, M. E.
Broken discrete symmetries in a frustrated honeycomb antiferromagnet
topic_facet Física
Honeycomb lattice
Frustrated magnetism
Phase transitions
description 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 Z4 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.
format Articulo
Preprint
author Rosales, Héctor Diego
Cabra, Daniel Carlos
Lamas, Carlos Alberto
Pujol, P.
Zhitomirsky, M. E.
author_facet Rosales, Héctor Diego
Cabra, Daniel Carlos
Lamas, Carlos Alberto
Pujol, P.
Zhitomirsky, M. E.
author_sort Rosales, Héctor Diego
title Broken discrete symmetries in a frustrated honeycomb antiferromagnet
title_short Broken discrete symmetries in a frustrated honeycomb antiferromagnet
title_full Broken discrete symmetries in a frustrated honeycomb antiferromagnet
title_fullStr Broken discrete symmetries in a frustrated honeycomb antiferromagnet
title_full_unstemmed Broken discrete symmetries in a frustrated honeycomb antiferromagnet
title_sort broken discrete symmetries in a frustrated honeycomb antiferromagnet
publishDate 2013
url http://sedici.unlp.edu.ar/handle/10915/99086
https://ri.conicet.gov.ar/11336/23499
https://journals.aps.org/prb/abstract/10.1103/PhysRevB.87.104402
https://arxiv.org/abs/1208.2416
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