Kagome antiferromagnet : a Schwinger-boson mean-field theory study

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Kagome antiferromagnet : a Schwinger-boson mean-field theory study

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dc.contributor.author Li, Peng
dc.contributor.author Su, Haibin
dc.contributor.author Shen, Shun-Qing
dc.date.accessioned 2011-07-14T07:12:05Z
dc.date.available 2011-07-14T07:12:05Z
dc.date.copyright 2007
dc.date.issued 2011-07-14
dc.identifier.citation Li, P., Su, H. & Shen, S.-Q. (2007). Kagome antiferromagnet : a Schwinger-boson mean-field theory study. Physical review B, 76.
dc.identifier.uri http://hdl.handle.net/10220/6908
dc.description.abstract The Heisenberg antiferromagnet on the kagome lattice is studied in the framework of Schwinger-boson mean-field theory. Two solutions with different symmetries are presented. One solution gives a conventional quantum state with q=0 order for all spin values. Another gives a gapped spin liquid state for spin S= 1/2 and a mixed state with both q=0 and √3 × √3 orders for spin S > 1/2 . We emphasize that the mixed state exhibits two sets of peaks in the static spin structure factor. For the case of spin S= 1/2 , the gap value we obtained is consistent with the previous numerical calculations by other means. We also discuss the thermodynamic quantities such as the specific heat and magnetic susceptibility at low temperatures and show that our result is in a good agreement with the Mermin-Wagner theorem.
dc.format.extent 7 p.
dc.language.iso en
dc.relation.ispartofseries Physical review B
dc.rights © 2007 American Physical Society. This paper was published in Physical Review B and is made available as an electronic reprint (preprint) with permission of American Physical Society. The paper can be found at: [DOI: http://dx.doi.org/10.1103/PhysRevB.76.174406]. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper is prohibited and is subject to penalties under law.
dc.subject DRNTU::Science::Physics::Atomic physics::Solid state physics.
dc.title Kagome antiferromagnet : a Schwinger-boson mean-field theory study
dc.type Journal Article
dc.contributor.school School of Materials Science and Engineering
dc.identifier.doi http://dx.doi.org/10.1103/PhysRevB.76.174406
dc.description.version Published version

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