1997/09/26 by Tota Nakamura, Kiyomi Okamoto · 2 citations
Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Magnetism in coordination complexes #Physics of Superconductivity and Magnetism #cond-mat
paper · pdf · doi:10.1103/physrevb.58.2411
published as Phys. Rev. B, 58 (1998) 2411 · 4 pages, REVTeX, 5 figures in eps-files
arxiv created 1997/09/26 · openalex publication_date 1998/08/01 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
We have analyzed the experimental susceptibility data of KCuCl3 and found that the data are well explained by the double-spin-chain models with strong antiferromagnetic dimerization. Large quantum Monte Carlo calculations were performed in the spin systems with frustration. This was made possible by removing the negative-sign problem with the use of the dimer basis that has spin-reversal symmetry. The numerical data agree with the experimental data within 1% relative errors in the whole temperature region. We also present a theoretical estimate for the dispersion relation and compare it with recent neutron-scattering experiments. Finally, the magnitude of each interaction bond is predicted.