Magnetic excitation spectra of $NaV_2O_5$

Details Magnetic excitation spectra of $NaV_2O_5$ Magnetic excitation spectra of $NaV_2O_5$

1998-06-22

arxiv.org/abs/cond-mat/9806258v2

Physics

Condensed Matter

8 pages, Latex, uses iopfts.sty, 4 eps figures, submitted to J. Phys. Cond. Matt., typos in abstract corrected

Scientific paper

We present low temperature Raman spectra of $NaV_2O_5$ single crystal. The assignation of the observed modes is done on the basis of Monte Carlo calculation of excited states of Heisenberg dimerized Hamiltonian, without frustration. We found a good agreement between measured and calculated magnetic excitations for $\delta=0.048$ and $J=452 K$. The singlet-triplet, singlet-singlet excitations as well as two-magnon mode are observed to be at 66, 127 and 132 cm^{-1}.

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