Dynamical properties of the compounds CuGeO_3 and α'--NaV_2O_5 at temperatures $T\neq 0$

Details Dynamical properties of the compounds CuGeO_3 and α'--NaV_2O_5 at temperatures $T\neq 0$ Dynamical properties of the compounds CuGeO_3 and α'--NaV_2O_5 at temperatures $T\neq 0$

1997-09-15

arxiv.org/abs/cond-mat/9709160v2

Physics

Condensed Matter

4 pages, REVTEX, 7 figures,minor corrections only; mainly misprints removed

Scientific paper

10.1103/PhysRevB.57.13371

The dynamical structure factor of the frustrated spin 1/2 Heisenberg model for a series of frustration parameters at finite temperatures is presented. A sharp upper boundary of the spinon continuum is found. A simple method to extract the nearest neighbour coupling J from the spectral width is suggested. Signatures of frustration are discussed and a comparison with neutron inelastic scattering data is given.

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