Abstract:
We reconsider the excitation spectra of a dimerized and frustrated antiferromagnetic Heisenberg chain. This model is taken as the simpler example of competing spontaneous and explicit dimerization relevant for spin-Peierls compounds. The bosonized theory is a two-frequency sine-Gordon field theory. We analyze the excitation spectrum by semiclassical methods. The elementary triplet excitation corresponds to an extended magnon whose radius diverges for vanishing dimerization. The internal oscillations of the magnon give rise to a series of excited states until another magnon is emitted and a two-magnon continuum is reached. We discuss, for weak dimerization, the manner in which the magnon forms as a result of a spinon-spinon interaction potential. © 1999 The American Physical Society.
Registro:
| Documento: |
Artículo
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| Título: | From spinons to magnons in explicit and spontaneously dimerized antiferromagnetic chains |
| Autor: | Dobry, A. |
| Filiación: | Departamento de Física, Universidad Nacional de Rosario, Instituto de Física Rosario, Avenida Pellegrini 250, 2000, Rosario, Argentina
Instituto de Astronomía y Física del Espacio, Casilla de Correos 67 Sucursal 28, Buenos Aires, 1428, Argentina
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| Año: | 1999
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| Volumen: | 59
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| Número: | 13
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| Página de inicio: | 8660
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| Página de fin: | 8663
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| DOI: |
http://dx.doi.org/10.1103/PhysRevB.59.8660 |
| Título revista: | Physical Review B - Condensed Matter and Materials Physics
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| Título revista abreviado: | Phys. Rev. B Condens. Matter Mater. Phys.
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| ISSN: | 10980121
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| Registro: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_10980121_v59_n13_p8660_Dobry |
Referencias:
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Citas:
---------- APA ----------
(1999)
. From spinons to magnons in explicit and spontaneously dimerized antiferromagnetic chains. Physical Review B - Condensed Matter and Materials Physics, 59(13), 8660-8663.
http://dx.doi.org/10.1103/PhysRevB.59.8660---------- CHICAGO ----------
Dobry, A.
"From spinons to magnons in explicit and spontaneously dimerized antiferromagnetic chains"
. Physical Review B - Condensed Matter and Materials Physics 59, no. 13
(1999) : 8660-8663.
http://dx.doi.org/10.1103/PhysRevB.59.8660---------- MLA ----------
Dobry, A.
"From spinons to magnons in explicit and spontaneously dimerized antiferromagnetic chains"
. Physical Review B - Condensed Matter and Materials Physics, vol. 59, no. 13, 1999, pp. 8660-8663.
http://dx.doi.org/10.1103/PhysRevB.59.8660---------- VANCOUVER ----------
Dobry, A. From spinons to magnons in explicit and spontaneously dimerized antiferromagnetic chains. Phys. Rev. B Condens. Matter Mater. Phys. 1999;59(13):8660-8663.
http://dx.doi.org/10.1103/PhysRevB.59.8660
