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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Autores principales: | , , |
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Formato: | Articulo Preprint |
Lenguaje: | Inglés |
Publicado: |
1998
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Acceso en línea: | http://sedici.unlp.edu.ar/handle/10915/123292 |
Aporte de: |
id |
I19-R120-10915-123292 |
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record_format |
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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 |
_version_ |
1764820449278033923 |