Long-range interactions in antiferromagnetic quantum spin chains

We study the role of long-range dipolar interactions on antiferromagnetic spin chains, from the classical S → ∞ limit to the deep quantum case S = 1/2 , including a transverse magnetic field. To this end, we combine different techniques such as classical energy minima, classical Monte Carlo, linear...

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Autores principales: Bravo, Bárbara, Cabra, Daniel Carlos, Gómez Albarracín, Flavia Alejandra, Rossini, Gerardo Luis
Formato: Articulo Preprint
Lenguaje:Inglés
Publicado: 2017
Materias:
Física
Magnetism
Long range
Dipolar interaction
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/99301
https://ri.conicet.gov.ar/11336/63636
https://journals.aps.org/prb/abstract/10.1103/PhysRevB.96.054441
https://arxiv.org/abs/1704.03420
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-99301
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Física
Magnetism
Long range
Dipolar interaction
spellingShingle Física
Magnetism
Long range
Dipolar interaction
Bravo, Bárbara
Cabra, Daniel Carlos
Gómez Albarracín, Flavia Alejandra
Rossini, Gerardo Luis
Long-range interactions in antiferromagnetic quantum spin chains
topic_facet Física
Magnetism
Long range
Dipolar interaction
description We study the role of long-range dipolar interactions on antiferromagnetic spin chains, from the classical S → ∞ limit to the deep quantum case S = 1/2 , including a transverse magnetic field. To this end, we combine different techniques such as classical energy minima, classical Monte Carlo, linear spin waves, bosonization, and density matrix renormalization group (DMRG). We find a phase transition from the already reported dipolar ferromagnetic region to an antiferromagnetic region for high enough antiferromagnetic exchange. Thermal and quantum fluctuations destabilize the classical order before reaching magnetic saturation in both phases, and also close to zero field in the antiferromagnetic phase. In the extreme quantum limit S = 1/2 , extensive DMRG computations show that the main phases remain present with transition lines to saturation significatively shifted to lower fields, in agreement with the bosonization analysis. The overall picture maintains a close analogy with the phase diagram of the anisotropic XXZ spin chain in a transverse field.
format Articulo
Preprint
author Bravo, Bárbara
Cabra, Daniel Carlos
Gómez Albarracín, Flavia Alejandra
Rossini, Gerardo Luis
author_facet Bravo, Bárbara
Cabra, Daniel Carlos
Gómez Albarracín, Flavia Alejandra
Rossini, Gerardo Luis
author_sort Bravo, Bárbara
title Long-range interactions in antiferromagnetic quantum spin chains
title_short Long-range interactions in antiferromagnetic quantum spin chains
title_full Long-range interactions in antiferromagnetic quantum spin chains
title_fullStr Long-range interactions in antiferromagnetic quantum spin chains
title_full_unstemmed Long-range interactions in antiferromagnetic quantum spin chains
title_sort long-range interactions in antiferromagnetic quantum spin chains
publishDate 2017
url http://sedici.unlp.edu.ar/handle/10915/99301
https://ri.conicet.gov.ar/11336/63636
https://journals.aps.org/prb/abstract/10.1103/PhysRevB.96.054441
https://arxiv.org/abs/1704.03420
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AT cabradanielcarlos longrangeinteractionsinantiferromagneticquantumspinchains
AT gomezalbarracinflaviaalejandra longrangeinteractionsinantiferromagneticquantumspinchains
AT rossinigerardoluis longrangeinteractionsinantiferromagneticquantumspinchains
bdutipo_str Repositorios
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