Crystallization of polarons through charge and spin ordering transitions in 1T-TaS2 - CNRS - Centre national de la recherche scientifique Accéder directement au contenu
Article Dans Une Revue Nature Communications Année : 2023

Crystallization of polarons through charge and spin ordering transitions in 1T-TaS2

Résumé

The interaction of electrons with the lattice in metals can lead to reduction of their kinetic energy to the point where they may form heavy, dressed quasiparticles—polarons. Unfortunately, polaronic lattice distortions are difficult to distinguish from more conventional charge- and spin-ordering phenomena at low temperatures. Here we present a study of local symmetry breaking of the lattice structure on the picosecond timescale in the prototype layered dichalcogenide Mott insulator 1T-TaS 2 using X-ray pair-distribution function measurements. We clearly identify symmetry-breaking polaronic lattice distortions at temperatures well above the ordered phases, and record the evolution of broken symmetry states from 915 K to 15 K. The data imply that charge ordering is driven by polaron crystallization into a Wigner crystal-like state, rather than Fermi surface nesting or conventional electron-phonon coupling. At intermediate temperatures the local lattice distortions are found to be consistent with a quantum spin liquid state.
Fichier principal
Vignette du fichier
TaS2_23-08389B.pdf (11.44 Mo) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)

Dates et versions

hal-04269727 , version 1 (03-11-2023)

Licence

Paternité

Identifiants

Citer

E. Bozin, M. Abeykoon, S. Conradson, Gianguido Baldinozzi, P. Sutar, et al.. Crystallization of polarons through charge and spin ordering transitions in 1T-TaS2. Nature Communications, 2023, 14 (1), pp.7055. ⟨10.1038/s41467-023-42631-6⟩. ⟨hal-04269727⟩
15 Consultations
6 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More