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arXiv · 2101.09455

Amplitude mode of charge density wave in TTF[Ni(dmit)2]2 observed by electronic Raman scattering

M. Revelli Beaumont·Y. Gallais·A. Sacuto·K. Jacob·L. Valade·D. de Caro·C. Faulmann·M. Cazayous
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Abstract

We measured the optical signature of the charge density waves (CDWs) in the multiband conductor TTF[Ni(dmit)2]2 by electronic Raman scattering. At low energies, a hump develops below 60 K. This hump is associated to the amplitude mode of the CDW with an energy around 9 meV. Raman symmetry-resolved measurements show that the CDW amplitude mode is anisotropic and that the CDW can be associated to the band nesting of Ni(dmit)2 chains.

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M. Revelli Beaumont, Y. Gallais, A. Sacuto, K. Jacob, L. Valade, D. de Caro, C. Faulmann, M. Cazayous. 2021-01-23. Amplitude mode of charge density wave in TTF[Ni(dmit)2]2 observed by electronic Raman scattering. https://doi.org/10.1103/physrevb.103.035139

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