Random Bond XXZ Chains with Modulated Couplings

The magnetization behavior of q -periodic antiferromagnetic spin- 1 / 2 Heisenberg chains under uniform magnetic fields is investigated in a background of disorder exchange distributions. By means of both real space decimation procedures and numerical diagonalizations in XX chains, it is found that...

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Autores principales: Cabra, Daniel Carlos, De Martino, A., Grynberg, Marcelo Daniel, Peysson, S., Pujol, P.
Formato: Articulo
Lenguaje:Inglés
Publicado: 2000
Materias:
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/104629
http://hdl.handle.net/11336/98446
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id I19-R120-10915-104629
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Física
Decimation
spellingShingle Física
Decimation
Cabra, Daniel Carlos
De Martino, A.
Grynberg, Marcelo Daniel
Peysson, S.
Pujol, P.
Random Bond XXZ Chains with Modulated Couplings
topic_facet Física
Decimation
description The magnetization behavior of q -periodic antiferromagnetic spin- 1 / 2 Heisenberg chains under uniform magnetic fields is investigated in a background of disorder exchange distributions. By means of both real space decimation procedures and numerical diagonalizations in XX chains, it is found that for binary disorder the magnetization exhibits wide plateaus at values of 1 + 2 ( p − 1 ) / q , where p is the disorder strength. In contrast, no spin gaps are observed in the presence of continuous exchange distributions. We also study the magnetic susceptibility at low magnetic fields.
format Articulo
Articulo
author Cabra, Daniel Carlos
De Martino, A.
Grynberg, Marcelo Daniel
Peysson, S.
Pujol, P.
author_facet Cabra, Daniel Carlos
De Martino, A.
Grynberg, Marcelo Daniel
Peysson, S.
Pujol, P.
author_sort Cabra, Daniel Carlos
title Random Bond XXZ Chains with Modulated Couplings
title_short Random Bond XXZ Chains with Modulated Couplings
title_full Random Bond XXZ Chains with Modulated Couplings
title_fullStr Random Bond XXZ Chains with Modulated Couplings
title_full_unstemmed Random Bond XXZ Chains with Modulated Couplings
title_sort random bond xxz chains with modulated couplings
publishDate 2000
url http://sedici.unlp.edu.ar/handle/10915/104629
http://hdl.handle.net/11336/98446
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AT grynbergmarcelodaniel randombondxxzchainswithmodulatedcouplings
AT peyssons randombondxxzchainswithmodulatedcouplings
AT pujolp randombondxxzchainswithmodulatedcouplings
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