Philippe Sindzingre - Academia.edu (original) (raw)

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Papers by Philippe Sindzingre

Physical Review Letters, Jul 12, 2016

arXiv (Cornell University), Aug 3, 2001

arXiv (Cornell University), Dec 15, 2002

Journal of Magnetism and Magnetic Materials, Mar 1, 2007

Journal of Physics: Condensed Matter, Mar 23, 2007

Physical Review Letters, Sep 22, 2005

arXiv (Cornell University), Jul 28, 2007

Canadian Journal of Physics, 2001

Physical Review B, Jul 15, 2005

arXiv (Cornell University), Dec 15, 2002

Recent Progress in Many-Body Theories, 2002

Thermodynamic properties such as magnetic susceptibility and specific heat have been computed for... more Thermodynamic properties such as magnetic susceptibility and specific heat have been computed for the Heisenberg Antiferromagnet with spatially anisotropic exchange on the kagome lattice on clusters up to N=24 spins from the full spectra obtained by exact diagonalization. This approach is shown to provide a good represention of these thermodynamic properties above temperatures of about Jrmav/5J_{\\rm av}/5Jrmav/5 where JrmavJ_{\\rm av}Jrmav is an average of the coupling constants. Comparison with experimental Volborthite data obtained by Hiroi {\\it {et al}} [J. Phys. Soc. Jpn. {\\bf 70},3377 (2001)] shows that Volborthite is best described by a model with nearly isotropic exchanges in spite of the significant distortion of the kagom\\'{e} lattice of magnetic sites in this compound and suggests that additional interactions are present. Comparison of the specific heat at low temperature raise the possibility that the density of states at low energy in Volborthite might be much lower than in the Heisenbe...