Experimental evidence for a spin-Peierls-transition in $α'-NaV_2O_5$

Details Experimental evidence for a spin-Peierls-transition in $α'-NaV_2O_5$ Experimental evidence for a spin-Peierls-transition in $α'-NaV_2O_5$

1997-03-05

arxiv.org/abs/cond-mat/9703052v1

Physics

Condensed Matter

Strongly Correlated Electrons

8 pages, 2 eps figures. To be published in Z. Phys. B (1997)

Scientific paper

10.1007/s002570050326

We present the first measurements of magnetisation and Raman light scattering on $\alpha'-NaV_2O_5$ single crystals. Below 34 K, we observe a pronounced isotropic decrease of the susceptibility indicating the opening of a spin gap. The transition temperature is slightly field dependent. Raman experiments reveal a crystallographic distortion at the transition. Our results clearly establish $\alpha'-NaV_2O_5$ to be the second inorganic spin-Peierls system.

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