Magnetization plateaux and jumps in frustrated four-leg spin tubes in magnetic fields

We study the ground state phase diagram of a frustrated spin-1/2 four-leg tube in an external magnetic field. We explore the parameter space of this model in the regime of all-antiferromagnetic exchange couplings by means of three different approaches: density matrix renormalization group (DMRG), a...

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Autores principales: Rosales, Héctor Diego, Arlego, Marcelo José Fabián, Gómez Albarracín, Flavia Alejandra
Formato: Objeto de conferencia
Lenguaje:Inglés
Publicado: 2014
Materias:
Física
Antiferromagnetic exchange
Magnetization plateaux
Magnetic fields
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/85327
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-85327
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Física
Antiferromagnetic exchange
Magnetization plateaux
Magnetic fields
spellingShingle Física
Antiferromagnetic exchange
Magnetization plateaux
Magnetic fields
Rosales, Héctor Diego
Arlego, Marcelo José Fabián
Gómez Albarracín, Flavia Alejandra
Magnetization plateaux and jumps in frustrated four-leg spin tubes in magnetic fields
topic_facet Física
Antiferromagnetic exchange
Magnetization plateaux
Magnetic fields
description We study the ground state phase diagram of a frustrated spin-1/2 four-leg tube in an external magnetic field. We explore the parameter space of this model in the regime of all-antiferromagnetic exchange couplings by means of three different approaches: density matrix renormalization group (DMRG), a low-energy effective Hamiltonian (LEH) and a Hartree variational approach (HVA). We find that in the limit of weakly interacting plaquettes, singlet and triplet states play an important role in the formation of magnetization plateaux. We study the transition regions numerically and analytically, and find that they are described, at first order in a strong- coupling expansion, by an XXZ spin-1/2 chain in a magnetic field. These results are consistent with the DMRG and HVA calculations.
format Objeto de conferencia
Objeto de conferencia
author Rosales, Héctor Diego
Arlego, Marcelo José Fabián
Gómez Albarracín, Flavia Alejandra
author_facet Rosales, Héctor Diego
Arlego, Marcelo José Fabián
Gómez Albarracín, Flavia Alejandra
author_sort Rosales, Héctor Diego
title Magnetization plateaux and jumps in frustrated four-leg spin tubes in magnetic fields
title_short Magnetization plateaux and jumps in frustrated four-leg spin tubes in magnetic fields
title_full Magnetization plateaux and jumps in frustrated four-leg spin tubes in magnetic fields
title_fullStr Magnetization plateaux and jumps in frustrated four-leg spin tubes in magnetic fields
title_full_unstemmed Magnetization plateaux and jumps in frustrated four-leg spin tubes in magnetic fields
title_sort magnetization plateaux and jumps in frustrated four-leg spin tubes in magnetic fields
publishDate 2014
url http://sedici.unlp.edu.ar/handle/10915/85327
work_keys_str_mv AT rosaleshectordiego magnetizationplateauxandjumpsinfrustratedfourlegspintubesinmagneticfields
AT arlegomarcelojosefabian magnetizationplateauxandjumpsinfrustratedfourlegspintubesinmagneticfields
AT gomezalbarracinflaviaalejandra magnetizationplateauxandjumpsinfrustratedfourlegspintubesinmagneticfields
bdutipo_str Repositorios
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