Exotic disordered phases in the quantum J1-J2 model on the honeycomb lattice

We study the ground-state phase diagram of the frustrated quantum J1-J2 Heisenberg antiferromagnet on the honeycomb lattice using a mean-field approach in terms of the Schwinger boson representation of the spin operators. We present results for the ground-state energy, local magnetization, energy ga...

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Detalles Bibliográficos
Autores principales: Lamas, Carlos Alberto, Zhang, Hao
Formato: Articulo Preprint
Lenguaje:Inglés
Publicado: 2013
Materias:
Ciencias Exactas
Física
física cuántica
magnetismo
honeycomb layer
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/38691
http://arxiv.org/abs/1301.2428
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-38691
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Exactas
Física
física cuántica
magnetismo
honeycomb layer
spellingShingle Ciencias Exactas
Física
física cuántica
magnetismo
honeycomb layer
Lamas, Carlos Alberto
Zhang, Hao
Exotic disordered phases in the quantum J1-J2 model on the honeycomb lattice
topic_facet Ciencias Exactas
Física
física cuántica
magnetismo
honeycomb layer
description We study the ground-state phase diagram of the frustrated quantum J1-J2 Heisenberg antiferromagnet on the honeycomb lattice using a mean-field approach in terms of the Schwinger boson representation of the spin operators. We present results for the ground-state energy, local magnetization, energy gap, and spin-spin correlations. The system shows magnetic long-range order for 0⩽J2/J1≲0.2075 (Néel) and 0.398≲J2/J1⩽0.5 (spiral). In the intermediate region, we find two magnetically disordered phases: a gapped spin liquid phase, which shows short-range Néel correlations (0.2075≲J2/J1≲0.3732), and a lattice nematic phase (0.3732≲J2/J1≲0.398), which is magnetically disordered but breaks lattice rotational symmetry. The errors in the values of the phase boundaries, which are implicit in the number of significant figures quoted, correspond purely to the error in the extrapolation of our finite-size results to the thermodynamic limit.
format Articulo
Preprint
author Lamas, Carlos Alberto
Zhang, Hao
author_facet Lamas, Carlos Alberto
Zhang, Hao
author_sort Lamas, Carlos Alberto
title Exotic disordered phases in the quantum J1-J2 model on the honeycomb lattice
title_short Exotic disordered phases in the quantum J1-J2 model on the honeycomb lattice
title_full Exotic disordered phases in the quantum J1-J2 model on the honeycomb lattice
title_fullStr Exotic disordered phases in the quantum J1-J2 model on the honeycomb lattice
title_full_unstemmed Exotic disordered phases in the quantum J1-J2 model on the honeycomb lattice
title_sort exotic disordered phases in the quantum j1-j2 model on the honeycomb lattice
publishDate 2013
url http://sedici.unlp.edu.ar/handle/10915/38691
http://arxiv.org/abs/1301.2428
work_keys_str_mv AT lamascarlosalberto exoticdisorderedphasesinthequantumj1j2modelonthehoneycomblattice
AT zhanghao exoticdisorderedphasesinthequantumj1j2modelonthehoneycomblattice
bdutipo_str Repositorios
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