Abstract
The lattice dynamics in the CuIr2S4 system have been investigated through Raman spectroscopy and the induced-pressure effect. Four Raman active modes are observed experimentally. Upon cooling, these Raman spectra undergo changes due to the Peierls-like phase transition. In addition, the substitution of Ag for Cu affects the amplitude of the Raman spectra while keeping their wave number unchanged. Furthermore, the positive and negative pressure effects are induced by shrinking and expanding the lattice. It is suggested that the pressure effect is an effective proof of the orbital-induced Peierls state mechanism.
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Zhang, L., Ling, L., Qu, Z. et al. Study of lattice dynamics in the CuIr2S4 system. Eur. Phys. J. B 77, 83–86 (2010). https://doi.org/10.1140/epjb/e2010-00256-5
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DOI: https://doi.org/10.1140/epjb/e2010-00256-5