Evidence of a spin-Peierls distortion in the quasi-one-dimensional magnetic compound CuGeO3
- 1 January 1994
- journal article
- Published by IOP Publishing in Journal of Physics: Condensed Matter
- Vol. 6 (3) , L19-L22
- https://doi.org/10.1088/0953-8984/6/3/001
Abstract
Neutron diffraction experiments were carried out on an inorganic quasi-one-dimensional magnet with spin 1/2 , CuGeO3, and showed satellite peaks arising due to the dimerization of Cu atoms. Displaying a spin-Peierls transition, Cu ions with spin 1/2 were found to reach a singlet ground state having alternating displacements between Cu atoms. Taking the shift of a Cu atom as an order parameter, the critical exponent beta becomes 0.5 and the shift resulting from dimerization along the c axis is about 1% of the lattice constant c at 2.7 K.Keywords
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