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Possible observation of the signature of the bad metal phase and its crossover to a Fermi liquid in κ –(BEDT–TTF) 2 Cu(NCS) 2 bulk and nanoparticles by Raman scattering

Abstract : κ‐(BEDT‐TTF)2Cu(NCS)2 has been investigated by Raman scattering in both bulk and nanoparticle compounds. Phonon modes from 20 to 1600 cm−1 have been assigned. Focusing on the unexplored low frequency phonons, a plateau in frequencies is observed in the bulk phonons between 50 and 100 K and assigned to the signature of the bad metal phase. Nanoparticles of κ‐(BEDT‐TTF)2Cu(NCS)2 exhibit anomalies at 50 K associated to the crossover from a bad metal to a Fermi liquid whose origins are discussed.
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https://hal.archives-ouvertes.fr/hal-03229011
Contributor : Marie-Hélène Gulli Connect in order to contact the contributor
Submitted on : Wednesday, October 13, 2021 - 11:08:53 AM
Last modification on : Thursday, December 2, 2021 - 2:10:05 PM

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M Revelli Beaumont, P Hemme, Y Gallais, A Sacuto, K Jacob, et al.. Possible observation of the signature of the bad metal phase and its crossover to a Fermi liquid in κ –(BEDT–TTF) 2 Cu(NCS) 2 bulk and nanoparticles by Raman scattering. Journal of Physics: Condensed Matter, IOP Publishing, 2021, 33 (12), pp.125403. ⟨10.1088/1361-648x/abd813⟩. ⟨hal-03229011⟩

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