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dc.contributor.author
Cannas, Sergio Alejandro
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dc.contributor.author
Stariolo, Daniel A.
dc.date.available
2021-01-29T20:36:10Z
dc.date.issued
2019-04-24
dc.identifier.citation
Cannas, Sergio Alejandro; Stariolo, Daniel A.; Three-state model with competing antiferromagnetic and pairing interactions; American Physical Society; Physical Review E covering statistical, nonlinear, biological, and soft matter physics; 99; 4; 24-4-2019; 1-9; 42137
dc.identifier.issn
2470-0045
dc.identifier.uri
http://hdl.handle.net/11336/124288
dc.description.abstract
Motivated by the rich phase diagram of the high-temperature superconductors, we introduce a pseudospin model with three state variables which can be interpreted as two states (spin ±1/2) particles and holes. The Hamiltonian has a term which favors antiferromagnetism and an additional competing interaction which favors bonding between pairs of antiparallel spins mediated by holes. For low concentration of holes the dominant interaction between particles has antiferromagnetic character, leading to an antiferromagnetic phase in the temperature-hole concentration phase diagram, qualitatively similar to the antiferromagnetic phase of doped Mott insulators. For growing concentration of holes antiferromagnetic order is weakened and a phase with a different kind of order mediated by holes appears. This last phase has the form of a dome in the T-hole concentration plane. The whole phase diagram resembles those of some families of high-Tc superconductors. We compute the phase diagram in the mean-field approximation and characterize the different phase transitions through Monte Carlo simulations.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
American Physical Society
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dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by/2.5/ar/
dc.subject
STATISTICAL MECHANICS
dc.subject
PHASE TRANSITIONS
dc.subject
SUPERCONDUCTIVITY
dc.subject.classification
Física de los Materiales Condensados
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dc.subject.classification
Ciencias Físicas
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dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
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dc.title
Three-state model with competing antiferromagnetic and pairing interactions
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2020-11-19T21:28:29Z
dc.journal.volume
99
dc.journal.number
4
dc.journal.pagination
1-9; 42137
dc.journal.pais
Estados Unidos
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dc.journal.ciudad
Maryland
dc.description.fil
Fil: Cannas, Sergio Alejandro. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Física Enrique Gaviola. Universidad Nacional de Córdoba. Instituto de Física Enrique Gaviola; Argentina. Universidad Nacional de Córdoba. Facultad de Matemática, Astronomía y Física; Argentina
dc.description.fil
Fil: Stariolo, Daniel A.. Universidade Federal Fluminense; Brasil. National Institute of Science and Technology for Complex Systems; Brasil
dc.journal.title
Physical Review E covering statistical, nonlinear, biological, and soft matter physics
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://journals.aps.org/pre/abstract/10.1103/PhysRevE.99.042137
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://arxiv.org/abs/1810.11373
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/https://doi.org/10.1103/PhysRevE.99.042137
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