Quantum disordered phase on the frustrated honeycomb lattice

In the present paper we study the phase diagram of the Heisenberg model on the honeycomb lattice with antiferromagnetic interactions up to third neighbors along the line J₂=J₃ that includes the point J₂=J₃=J₁/2, corresponding to the highly frustrated point where the classical ground state has macros...

Descripción completa

Guardado en:
Detalles Bibliográficos
Autores principales: Cabra, Daniel Carlos, Lamas, Carlos Alberto, Rosales, Héctor Diego
Formato: Articulo
Lenguaje:Inglés
Publicado: 2011
Materias:
Física
Physics
Lattice (order)
Antiferromagnetism
Quantum limit
Heisenberg model
Mean field theory
Condensed matter physics
Quantum mechanics
Ground state
Boson
Phase diagram
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/126230
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-126230
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
Lattice (order)
Antiferromagnetism
Quantum limit
Heisenberg model
Mean field theory
Condensed matter physics
Quantum mechanics
Ground state
Boson
Phase diagram
spellingShingle Física
Physics
Lattice (order)
Antiferromagnetism
Quantum limit
Heisenberg model
Mean field theory
Condensed matter physics
Quantum mechanics
Ground state
Boson
Phase diagram
Cabra, Daniel Carlos
Lamas, Carlos Alberto
Rosales, Héctor Diego
Quantum disordered phase on the frustrated honeycomb lattice
topic_facet Física
Physics
Lattice (order)
Antiferromagnetism
Quantum limit
Heisenberg model
Mean field theory
Condensed matter physics
Quantum mechanics
Ground state
Boson
Phase diagram
description In the present paper we study the phase diagram of the Heisenberg model on the honeycomb lattice with antiferromagnetic interactions up to third neighbors along the line J₂=J₃ that includes the point J₂=J₃=J₁/2, corresponding to the highly frustrated point where the classical ground state has macroscopic degeneracy. Using the linear spin-wave theory and the Schwinger boson technique followed by a mean field decoupling and exact diagonalization for small systems, we find an intermediate phase with a spin gap and short-range Néel correlations in the strong quantum limit S=½. All techniques provide consistent results which allow us to predict the existence of a quantum disordered phase, which may have been observed in recent high-field ESR measurements in manganites.
format Articulo
Articulo
author Cabra, Daniel Carlos
Lamas, Carlos Alberto
Rosales, Héctor Diego
author_facet Cabra, Daniel Carlos
Lamas, Carlos Alberto
Rosales, Héctor Diego
author_sort Cabra, Daniel Carlos
title Quantum disordered phase on the frustrated honeycomb lattice
title_short Quantum disordered phase on the frustrated honeycomb lattice
title_full Quantum disordered phase on the frustrated honeycomb lattice
title_fullStr Quantum disordered phase on the frustrated honeycomb lattice
title_full_unstemmed Quantum disordered phase on the frustrated honeycomb lattice
title_sort quantum disordered phase on the frustrated honeycomb lattice
publishDate 2011
url http://sedici.unlp.edu.ar/handle/10915/126230
work_keys_str_mv AT cabradanielcarlos quantumdisorderedphaseonthefrustratedhoneycomblattice
AT lamascarlosalberto quantumdisorderedphaseonthefrustratedhoneycomblattice
AT rosaleshectordiego quantumdisorderedphaseonthefrustratedhoneycomblattice
bdutipo_str Repositorios
_version_ 1764820450214412289

Ejemplares similares