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 - CNRS - Centre national de la recherche scientifique Accéder directement au contenu
Article Dans Une Revue Journal of Physics: Condensed Matter Année : 2021

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

Résumé

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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Dates et versions

hal-03229011 , version 1 (13-10-2021)

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M Revelli Beaumont, Pierre 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, 2021, 33 (12), pp.125403. ⟨10.1088/1361-648x/abd813⟩. ⟨hal-03229011⟩
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