2008/05/22 by M. J. Rozenberg, R. Chitra · 17 citations
Physics and Astronomy · #Advanced Condensed Matter Physics #Antiferromagnetism #Condensed matter physics #Lattice (music) #Physics #Physics of Superconductivity and Magnetism #Spin (aerodynamics) #Thermodynamics #Topological Materials and Phenomena #cond-mat.str-el
paper · pdf · doi:10.1103/physrevb.78.132406
published in Physical Review B 78(13) (American Physical Society) · 5 pages, 4 figures
arxiv created 2008/05/22 · openalex publication_date 2008/10/10 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
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.