Disorder effects in the quantum kagome antiferromagnet ZnCu 3(OH)6Cl2

Motivated by the recent NMR experiments on ZnCu3(OH)6Cl2, we study the effect of nonmagnetic defects on the antiferromagnetic spin-1/2 kagome lattice. We use exact diagonalization methods to study the effect of two such defects on finite-size systems. Our results, obtained without adjustable paramet...

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Detalles Bibliográficos
Autor principal: Rozenberg, Marcelo Javier
Publicado: 2008
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_10980121_v78_n13_p_Rozenberg
http://hdl.handle.net/20.500.12110/paper_10980121_v78_n13_p_Rozenberg
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_10980121_v78_n13_p_Rozenberg
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spelling paper:paper_10980121_v78_n13_p_Rozenberg2023-06-08T16:07:41Z Disorder effects in the quantum kagome antiferromagnet ZnCu 3(OH)6Cl2 Rozenberg, Marcelo Javier Motivated by the recent NMR experiments on ZnCu3(OH)6Cl2, we study the effect of nonmagnetic defects on the antiferromagnetic spin-1/2 kagome lattice. We use exact diagonalization methods to study the effect of two such defects on finite-size systems. Our results, obtained without adjustable parameters, are in good quantitative agreement with recent 17O NMR data. They provide support for the experimental interpretation of the presence of defects within the kagome layers due to Zn/Cu substitutions. Our results also show that disorder effects become relevant at lower temperatures, raising questions about the experimental evidence for the absence of an intrinsic spin gap in the kagome two-dimensional layers. ©2008 The American Physical Society. Fil:Rozenberg, M.J. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2008 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_10980121_v78_n13_p_Rozenberg http://hdl.handle.net/20.500.12110/paper_10980121_v78_n13_p_Rozenberg
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
description Motivated by the recent NMR experiments on ZnCu3(OH)6Cl2, we study the effect of nonmagnetic defects on the antiferromagnetic spin-1/2 kagome lattice. We use exact diagonalization methods to study the effect of two such defects on finite-size systems. Our results, obtained without adjustable parameters, are in good quantitative agreement with recent 17O NMR data. They provide support for the experimental interpretation of the presence of defects within the kagome layers due to Zn/Cu substitutions. Our results also show that disorder effects become relevant at lower temperatures, raising questions about the experimental evidence for the absence of an intrinsic spin gap in the kagome two-dimensional layers. ©2008 The American Physical Society.
author Rozenberg, Marcelo Javier
spellingShingle Rozenberg, Marcelo Javier
Disorder effects in the quantum kagome antiferromagnet ZnCu 3(OH)6Cl2
author_facet Rozenberg, Marcelo Javier
author_sort Rozenberg, Marcelo Javier
title Disorder effects in the quantum kagome antiferromagnet ZnCu 3(OH)6Cl2
title_short Disorder effects in the quantum kagome antiferromagnet ZnCu 3(OH)6Cl2
title_full Disorder effects in the quantum kagome antiferromagnet ZnCu 3(OH)6Cl2
title_fullStr Disorder effects in the quantum kagome antiferromagnet ZnCu 3(OH)6Cl2
title_full_unstemmed Disorder effects in the quantum kagome antiferromagnet ZnCu 3(OH)6Cl2
title_sort disorder effects in the quantum kagome antiferromagnet zncu 3(oh)6cl2
publishDate 2008
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_10980121_v78_n13_p_Rozenberg
http://hdl.handle.net/20.500.12110/paper_10980121_v78_n13_p_Rozenberg
work_keys_str_mv AT rozenbergmarcelojavier disordereffectsinthequantumkagomeantiferromagnetzncu3oh6cl2
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