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

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 f...

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Main Authors: Li, Peng, Su, Haibin, Shen, Shun-Qing
Other Authors: School of Materials Science & Engineering
Format: Article
Language:English
Published: 2011
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Online Access:https://hdl.handle.net/10356/91718
http://hdl.handle.net/10220/6908
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-917182023-07-14T15:44:48Z Kagome antiferromagnet : a Schwinger-boson mean-field theory study Li, Peng Su, Haibin Shen, Shun-Qing School of Materials Science & Engineering DRNTU::Science::Physics::Atomic physics::Solid state physics 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. Published version 2011-07-14T07:12:05Z 2019-12-06T18:10:43Z 2011-07-14T07:12:05Z 2019-12-06T18:10:43Z 2007 2007 Journal Article Li, P., Su, H. & Shen, S.-Q. (2007). Kagome antiferromagnet : a Schwinger-boson mean-field theory study. Physical review B, 76. https://hdl.handle.net/10356/91718 http://hdl.handle.net/10220/6908 10.1103/PhysRevB.76.174406 en Physical review B © 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. 7 p. application/pdf
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic DRNTU::Science::Physics::Atomic physics::Solid state physics
spellingShingle DRNTU::Science::Physics::Atomic physics::Solid state physics
Li, Peng
Su, Haibin
Shen, Shun-Qing
Kagome antiferromagnet : a Schwinger-boson mean-field theory study
description 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.
author2 School of Materials Science & Engineering
author_facet School of Materials Science & Engineering
Li, Peng
Su, Haibin
Shen, Shun-Qing
format Article
author Li, Peng
Su, Haibin
Shen, Shun-Qing
author_sort Li, Peng
title Kagome antiferromagnet : a Schwinger-boson mean-field theory study
title_short Kagome antiferromagnet : a Schwinger-boson mean-field theory study
title_full Kagome antiferromagnet : a Schwinger-boson mean-field theory study
title_fullStr Kagome antiferromagnet : a Schwinger-boson mean-field theory study
title_full_unstemmed Kagome antiferromagnet : a Schwinger-boson mean-field theory study
title_sort kagome antiferromagnet : a schwinger-boson mean-field theory study
publishDate 2011
url https://hdl.handle.net/10356/91718
http://hdl.handle.net/10220/6908
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