The effective charge velocity of spin-¹/2 superlattices

Detalhes bibliográficos
Autor(a) principal: Silva-Valencia,J.
Data de Publicação: 2006
Outros Autores: Franco,R., Figueira,M. S.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Brazilian Journal of Physics
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-97332006000600035
Resumo: We calculate the spin gap of homogeneous and inhomogeneous spin chains, using the White's density matrix renormalization group technique. We found that the spin gap is related to the ration between the spin velocity and the correlation exponent. We consider a spin superlattice, which is composed of a repeated pattern of two spin-¹/2 XXZ chains with different anisotropy parameters. The behavior of the charge velocity as a function of the anisotropy parameter and the relative size of sub-chains was investigated. We found reasonable agreement between the bosonization results and the numerical ones.
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spelling The effective charge velocity of spin-¹/2 superlatticesHeinsenbergDMRGPlateausLuttinger liquidWe calculate the spin gap of homogeneous and inhomogeneous spin chains, using the White's density matrix renormalization group technique. We found that the spin gap is related to the ration between the spin velocity and the correlation exponent. We consider a spin superlattice, which is composed of a repeated pattern of two spin-¹/2 XXZ chains with different anisotropy parameters. The behavior of the charge velocity as a function of the anisotropy parameter and the relative size of sub-chains was investigated. We found reasonable agreement between the bosonization results and the numerical ones.Sociedade Brasileira de Física2006-09-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-97332006000600035Brazilian Journal of Physics v.36 n.3b 2006reponame:Brazilian Journal of Physicsinstname:Sociedade Brasileira de Física (SBF)instacron:SBF10.1590/S0103-97332006000600035info:eu-repo/semantics/openAccessSilva-Valencia,J.Franco,R.Figueira,M. S.eng2006-11-29T00:00:00Zoai:scielo:S0103-97332006000600035Revistahttp://www.sbfisica.org.br/v1/home/index.php/pt/ONGhttps://old.scielo.br/oai/scielo-oai.phpsbfisica@sbfisica.org.br||sbfisica@sbfisica.org.br1678-44480103-9733opendoar:2006-11-29T00:00Brazilian Journal of Physics - Sociedade Brasileira de Física (SBF)false
dc.title.none.fl_str_mv The effective charge velocity of spin-¹/2 superlattices
title The effective charge velocity of spin-¹/2 superlattices
spellingShingle The effective charge velocity of spin-¹/2 superlattices
Silva-Valencia,J.
Heinsenberg
DMRG
Plateaus
Luttinger liquid
title_short The effective charge velocity of spin-¹/2 superlattices
title_full The effective charge velocity of spin-¹/2 superlattices
title_fullStr The effective charge velocity of spin-¹/2 superlattices
title_full_unstemmed The effective charge velocity of spin-¹/2 superlattices
title_sort The effective charge velocity of spin-¹/2 superlattices
author Silva-Valencia,J.
author_facet Silva-Valencia,J.
Franco,R.
Figueira,M. S.
author_role author
author2 Franco,R.
Figueira,M. S.
author2_role author
author
dc.contributor.author.fl_str_mv Silva-Valencia,J.
Franco,R.
Figueira,M. S.
dc.subject.por.fl_str_mv Heinsenberg
DMRG
Plateaus
Luttinger liquid
topic Heinsenberg
DMRG
Plateaus
Luttinger liquid
description We calculate the spin gap of homogeneous and inhomogeneous spin chains, using the White's density matrix renormalization group technique. We found that the spin gap is related to the ration between the spin velocity and the correlation exponent. We consider a spin superlattice, which is composed of a repeated pattern of two spin-¹/2 XXZ chains with different anisotropy parameters. The behavior of the charge velocity as a function of the anisotropy parameter and the relative size of sub-chains was investigated. We found reasonable agreement between the bosonization results and the numerical ones.
publishDate 2006
dc.date.none.fl_str_mv 2006-09-01
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-97332006000600035
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-97332006000600035
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/S0103-97332006000600035
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv text/html
dc.publisher.none.fl_str_mv Sociedade Brasileira de Física
publisher.none.fl_str_mv Sociedade Brasileira de Física
dc.source.none.fl_str_mv Brazilian Journal of Physics v.36 n.3b 2006
reponame:Brazilian Journal of Physics
instname:Sociedade Brasileira de Física (SBF)
instacron:SBF
instname_str Sociedade Brasileira de Física (SBF)
instacron_str SBF
institution SBF
reponame_str Brazilian Journal of Physics
collection Brazilian Journal of Physics
repository.name.fl_str_mv Brazilian Journal of Physics - Sociedade Brasileira de Física (SBF)
repository.mail.fl_str_mv sbfisica@sbfisica.org.br||sbfisica@sbfisica.org.br
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