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Topological Excitations in Quantum Spin Systems
Joint Authors
Chaudhury, Ranjan
Paul, Samir K.
Source
Advances in Condensed Matter Physics
Issue
Vol. 2013, Issue 2013 (31 Dec. 2013), pp.1-8, 8 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2013-11-21
Country of Publication
Egypt
No. of Pages
8
Main Subjects
Abstract EN
The origin and significance of topological excitations in quantum spin models in low dimensions are presented in detail.
Besides a general review, our own work in this area is described in great depth.
Apart from theoretical analysis of the existence and properties of spin vortices and antivortices, the possible experimental consequences and signatures are also highlighted.
In particular, the distinguishing features between the even and odd charged topological excitations are brought out through a detailed analysis of the topological term in the quantum action.
Moreover, an interesting symmetry property is predicted between the excitations from a ferromagnetic model and an antiferromagnetic model.
Through a novel approach of ours, a bridge is established between field theoretical formalism and the well-known statistical mechanical treatment of Berezinskii-Kosterlitz-Thouless (BKT) transition involving these topological excitations.
Furthermore, a detailed phenomenological analysis of the experimentally observed static and dynamic magnetic properties of the layered magnetic materials, possessing XY anisotropy in the in-plane spin-spin couplings, is undertaken to test the theoretical predictions regarding the behaviour of these excitations.
The importance and the crucial role of quantum spin fluctuations in these studies are also brought out very clearly by our analysis.
American Psychological Association (APA)
Chaudhury, Ranjan& Paul, Samir K.. 2013. Topological Excitations in Quantum Spin Systems. Advances in Condensed Matter Physics،Vol. 2013, no. 2013, pp.1-8.
https://search.emarefa.net/detail/BIM-497722
Modern Language Association (MLA)
Chaudhury, Ranjan& Paul, Samir K.. Topological Excitations in Quantum Spin Systems. Advances in Condensed Matter Physics No. 2013 (2013), pp.1-8.
https://search.emarefa.net/detail/BIM-497722
American Medical Association (AMA)
Chaudhury, Ranjan& Paul, Samir K.. Topological Excitations in Quantum Spin Systems. Advances in Condensed Matter Physics. 2013. Vol. 2013, no. 2013, pp.1-8.
https://search.emarefa.net/detail/BIM-497722
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-497722