Magnetization plateaux in <i>N</i>-leg spin ladders

In this paper we continue and extend a systematic study of plateaux in magnetization curves of antiferromagnetic Heisenberg spin-1/2 ladders. We first review a bosonic field-theoretical formulation of a single XXZ-chain in the presence of a magnetic field, which is then used for an Abelian bosonizat...

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Detalles Bibliográficos
Autores principales: Cabra, Daniel Carlos, Honecker, Andreas, Pujol, Pierre
Formato: Articulo Preprint
Lenguaje:Inglés
Publicado: 1998
Materias:
Física
Magnetic field
Physics
Abelian group
Phase transition
Antiferromagnetism
Hamiltonian (quantum mechanics)
Condensed matter physics
Bosonization
Magnetization
Excitation
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/123292
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-123292
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Física
Magnetic field
Physics
Abelian group
Phase transition
Antiferromagnetism
Hamiltonian (quantum mechanics)
Condensed matter physics
Bosonization
Magnetization
Excitation
spellingShingle Física
Magnetic field
Physics
Abelian group
Phase transition
Antiferromagnetism
Hamiltonian (quantum mechanics)
Condensed matter physics
Bosonization
Magnetization
Excitation
Cabra, Daniel Carlos
Honecker, Andreas
Pujol, Pierre
Magnetization plateaux in <i>N</i>-leg spin ladders
topic_facet Física
Magnetic field
Physics
Abelian group
Phase transition
Antiferromagnetism
Hamiltonian (quantum mechanics)
Condensed matter physics
Bosonization
Magnetization
Excitation
description In this paper we continue and extend a systematic study of plateaux in magnetization curves of antiferromagnetic Heisenberg spin-1/2 ladders. We first review a bosonic field-theoretical formulation of a single XXZ-chain in the presence of a magnetic field, which is then used for an Abelian bosonization analysis of N weakly coupled chains. Predictions for the universality classes of the phase transitions at the plateaux boundaries are obtained in addition to a quantization condition for the value of the magnetization on a plateau. These results are complemented by and checked against strong-coupling expansions. Finally, we analyze the strong-coupling effective Hamiltonian for an odd number $N$ of cylindrically coupled chains numerically. For N we explicitly observe a spin gap with a massive spinon-type fundamental excitation and obtain indications that this gap probably survives the limit N → ∞.
format Articulo
Preprint
author Cabra, Daniel Carlos
Honecker, Andreas
Pujol, Pierre
author_facet Cabra, Daniel Carlos
Honecker, Andreas
Pujol, Pierre
author_sort Cabra, Daniel Carlos
title Magnetization plateaux in <i>N</i>-leg spin ladders
title_short Magnetization plateaux in <i>N</i>-leg spin ladders
title_full Magnetization plateaux in <i>N</i>-leg spin ladders
title_fullStr Magnetization plateaux in <i>N</i>-leg spin ladders
title_full_unstemmed Magnetization plateaux in <i>N</i>-leg spin ladders
title_sort magnetization plateaux in <i>n</i>-leg spin ladders
publishDate 1998
url http://sedici.unlp.edu.ar/handle/10915/123292
work_keys_str_mv AT cabradanielcarlos magnetizationplateauxininilegspinladders
AT honeckerandreas magnetizationplateauxininilegspinladders
AT pujolpierre magnetizationplateauxininilegspinladders
bdutipo_str Repositorios
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