Article Dans Une Revue Journal of Physics: Condensed Matter Année : 2025

Drastic enhancement of electronic correlations induced by hydrogen insertion in the cerium intermetallic compound CeFeSi

Résumé

We report a comparative study of two cerium-based intermetallic compounds: CeFeSi with an anti-PbFCl type structure, and CeFeSiH with a ZrCuSiAs type structure. The latter is obtained from CeFeSi through hydrogen insertion. Our results are based on x-rays, transport, thermodynamic and magnetic measurements. While the tetragonal structure with P4/nmm symmetry remains unchanged after hydrogen insertion, the thermodynamic, magnetic, and transport properties change drastically. On the one hand, CeFeSi behaves as a Pauli paramagnet with a small Sommerfeld coefficient, indicating the absence of 4f electron physics. On the other hand, our study shows that CeFeSiH exhibits strong magnetic fluctuations with a magnetic transition at 3.5 K, and coherent Kondo-lattice heavy-fermion features.

Fichier principal
Vignette du fichier
2025-044.pdf (1.54 Mo) Télécharger le fichier
Origine Publication financée par une institution
Licence

Dates et versions

hal-05005719 , version 1 (25-03-2025)

Licence

Identifiants

Citer

Jérémy Sourd, Baptiste Vignolle, Etienne Gaudin, Sébastien Burdin, Sophie Tencé. Drastic enhancement of electronic correlations induced by hydrogen insertion in the cerium intermetallic compound CeFeSi. Journal of Physics: Condensed Matter, 2025, 37 (9), pp.095601. ⟨10.1088/1361-648x/ad92d3⟩. ⟨hal-05005719⟩
187 Consultations
72 Téléchargements

Altmetric

Partager

  • More