Self consistent study of the quantum phases in a frustrated antiferromagnet on the bilayer honeycomb lattice

We study the frustrated Heisenberg model on the bilayer honeycomb lattice. The ground-state energy and spin gap are calculated, using different bosonic representations at mean field level and numerical calculations, to explore different sectors of the phase diagram. In particular we make use of a bo...

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Detalles Bibliográficos
Autores principales: Arlego, Marcelo José Fabián, Lamas, Carlos Alberto, Zhang, Hao
Formato: Articulo
Lenguaje:Inglés
Publicado: 2014
Materias:
Física
Physics
Antiferromagnetism
Series expansion
Bilayer
Heisenberg model
Mean field theory
Condensed matter physics
Quantum mechanics
Boson
Quantum phases
Phase diagram
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/127061
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-127061
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Física
Physics
Antiferromagnetism
Series expansion
Bilayer
Heisenberg model
Mean field theory
Condensed matter physics
Quantum mechanics
Boson
Quantum phases
Phase diagram
spellingShingle Física
Physics
Antiferromagnetism
Series expansion
Bilayer
Heisenberg model
Mean field theory
Condensed matter physics
Quantum mechanics
Boson
Quantum phases
Phase diagram
Arlego, Marcelo José Fabián
Lamas, Carlos Alberto
Zhang, Hao
Self consistent study of the quantum phases in a frustrated antiferromagnet on the bilayer honeycomb lattice
topic_facet Física
Physics
Antiferromagnetism
Series expansion
Bilayer
Heisenberg model
Mean field theory
Condensed matter physics
Quantum mechanics
Boson
Quantum phases
Phase diagram
description We study the frustrated Heisenberg model on the bilayer honeycomb lattice. The ground-state energy and spin gap are calculated, using different bosonic representations at mean field level and numerical calculations, to explore different sectors of the phase diagram. In particular we make use of a bond operator formalism and series expansion calculations to study the extent of dimer inter-layer phase. On the other hand we use the Schwinger boson method and exact diagonalization on small systems to analyze the evolution of on-layer phases. In this case we specifically observe a phase that presents a spin gap and short range Neel correlations that survives even in the presence of non-zero next-nearest-neighbor interaction and inter-layer coupling.
format Articulo
Articulo
author Arlego, Marcelo José Fabián
Lamas, Carlos Alberto
Zhang, Hao
author_facet Arlego, Marcelo José Fabián
Lamas, Carlos Alberto
Zhang, Hao
author_sort Arlego, Marcelo José Fabián
title Self consistent study of the quantum phases in a frustrated antiferromagnet on the bilayer honeycomb lattice
title_short Self consistent study of the quantum phases in a frustrated antiferromagnet on the bilayer honeycomb lattice
title_full Self consistent study of the quantum phases in a frustrated antiferromagnet on the bilayer honeycomb lattice
title_fullStr Self consistent study of the quantum phases in a frustrated antiferromagnet on the bilayer honeycomb lattice
title_full_unstemmed Self consistent study of the quantum phases in a frustrated antiferromagnet on the bilayer honeycomb lattice
title_sort self consistent study of the quantum phases in a frustrated antiferromagnet on the bilayer honeycomb lattice
publishDate 2014
url http://sedici.unlp.edu.ar/handle/10915/127061
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AT lamascarlosalberto selfconsistentstudyofthequantumphasesinafrustratedantiferromagnetonthebilayerhoneycomblattice
AT zhanghao selfconsistentstudyofthequantumphasesinafrustratedantiferromagnetonthebilayerhoneycomblattice
bdutipo_str Repositorios
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