Possible observation of the signature of the bad metal phase and its crossover to a Fermi liquid in &#922;-(BEDT-TTF)<sub>2</sub>Cu(NCS)<sub>2</sub>bulk and nanoparticles by Raman scattering.

Revelli, Marco; Hemme, Pierre; Gallais, Yann; Sacuto, A; Jacob, Kane; Valade, Lydie; De Caro, Dominique; Faulmann, Christophe; Cazayous, Maximilien

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

Revelli, Marco; Hemme, Pierre; Gallais, Yann; Sacuto, A; Jacob, Kane; Valade, Lydie; De Caro, Dominique; Faulmann, Christophe; Cazayous, Maximilien.

Afiliação

Revelli M; Paris University, 10 rue Alice Domon et Léonie Duquet, Paris, Île-de-France, 75013, FRANCE.
Hemme P; Paris University, 10 rue Alice Domon et Léonie Duquet, Paris, Île-de-France, 75013, FRANCE.
Gallais Y; Laboratoire Matériaux et Phénomenes Quantiques, Université Paris Diderot-Paris 7, Bâtiment Condorcet, Paris, 75205, FRANCE.
Sacuto A; Paris University, 10 rue Alice Domon et Léonie Duquet, Paris, Île-de-France, 75013, FRANCE.
Jacob K; Coordination and chemistry laboratory, 205 Route de Narbonne, Toulouse, 31400, FRANCE.
Valade L; Coordination and chemistry laboratory, 205 Route de Narbonne, Toulouse, 31400, FRANCE.
De Caro D; Coordination and Chemistry Laboratory, 205 Route de Narbonne, Toulouse, 31400, FRANCE.
Faulmann C; Coordination and Chemistry Laboratory, 205 Route de Narbonne, Toulouse, 31400, FRANCE.
Cazayous M; Paris University, 10 rue Alice Domon et Léonie Duquet, Paris, 75013, FRANCE.

J Phys Condens Matter ; 2021 Jan 04.

Article em En | MEDLINE | ID: mdl-33395675

ABSTRACT

ABSTRACT

Κ-(BEDT-TTF)2Cu(NCS)2has been investigated by Raman scattering in both bulk and nanoparticle compounds. Phonon modes from 20 to 1600 cm-1have 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)2exhibit anomalies at 50 K associated to the crossover from a bad metal to a Fermi liquid whose origins are discussed.

Palavras-chave

Raman; organics; phonons

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Texto completo: 1 Base de dados: MEDLINE Idioma: En Ano de publicação: 2021 Tipo de documento: Article

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