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dc.contributor.author
Ghioldi, Esteban Agustín  
dc.contributor.author
Gonzalez, Matías Gabriel  
dc.contributor.author
Manuel, Luis Oscar  
dc.contributor.author
Trumper, Adolfo Emilio  
dc.date.available
2018-07-17T21:19:40Z  
dc.date.issued
2016-03  
dc.identifier.citation
Ghioldi, Esteban Agustín; Gonzalez, Matías Gabriel; Manuel, Luis Oscar; Trumper, Adolfo Emilio; RVB signatures in the spin dynamics of the square-lattice Heisenberg antiferromagnet ; IOP Publishing; Europhysics Letters; 113; 5; 3-2016; 1-6; 57001  
dc.identifier.issn
0295-5075  
dc.identifier.uri
http://hdl.handle.net/11336/52533  
dc.description.abstract
We investigate the spin dynamics of the square-lattice spin- 1/2 Heisenberg antiferromagnet by means of an improved mean-field Schwinger boson calculation. By identifying both, the long-range Neel and the RVB-like components of the ground state, we propose an educated guess for the mean-field magnetic excitation consisting on a linear combination of local and bond spin flips to compute the dynamical structure factor. Our main result is that when this magnetic excitation is optimized in such a way that the corresponding sum rule is fulfilled, we recover the low- and high-energy spectral weight features of the experimental spectrum. In particular, the anomalous spectral weight depletion at (π, 0) found in recent inelastic neutron scattering experiments can be attributed to the interference of the triplet bond excitations of the RVB component of the ground state. We conclude that the Schwinger boson theory seems to be a good candidate to adequately interpret the dynamic properties of the square-lattice Heisenberg antiferromagnet.  
dc.format
application/pdf  
dc.language.iso
eng  
dc.publisher
IOP Publishing  
dc.rights
info:eu-repo/semantics/openAccess  
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/  
dc.subject
Dynamic Properties  
dc.subject
Antiferromagnetics  
dc.subject.classification
Otras Ciencias Físicas  
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Ciencias Físicas  
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CIENCIAS NATURALES Y EXACTAS  
dc.title
RVB signatures in the spin dynamics of the square-lattice Heisenberg antiferromagnet  
dc.type
info:eu-repo/semantics/article  
dc.type
info:ar-repo/semantics/artículo  
dc.type
info:eu-repo/semantics/publishedVersion  
dc.date.updated
2018-07-17T14:06:30Z  
dc.journal.volume
113  
dc.journal.number
5  
dc.journal.pagination
1-6; 57001  
dc.journal.pais
Reino Unido  
dc.description.fil
Fil: Ghioldi, Esteban Agustín. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Rosario. Instituto de Física de Rosario. Universidad Nacional de Rosario. Instituto de Física de Rosario; Argentina  
dc.description.fil
Fil: Gonzalez, Matías Gabriel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Rosario. Instituto de Física de Rosario. Universidad Nacional de Rosario. Instituto de Física de Rosario; Argentina  
dc.description.fil
Fil: Manuel, Luis Oscar. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Rosario. Instituto de Física de Rosario. Universidad Nacional de Rosario. Instituto de Física de Rosario; Argentina  
dc.description.fil
Fil: Trumper, Adolfo Emilio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Rosario. Instituto de Física de Rosario. Universidad Nacional de Rosario. Instituto de Física de Rosario; Argentina  
dc.journal.title
Europhysics Letters  
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1209/0295-5075/113/57001  
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info:eu-repo/semantics/altIdentifier/url/http://iopscience.iop.org/article/10.1209/0295-5075/113/57001/meta