Effects of low-energy excitations on spectral properties at higher binding energy: The metal-insulator transition of VO$_2$ - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Physical Review Letters Année : 2015

Effects of low-energy excitations on spectral properties at higher binding energy: The metal-insulator transition of VO$_2$

Résumé

The effects of electron interaction on spectral properties can be understood in terms of coupling between excitations. In transition metal oxides the spectral function close to the Fermi level and low-energy excitations between d states have attracted particular attention. In this work we focus on photoemission spectra of vanadium dioxide over a wide (10 eV) range of binding energies. We show that there are clear signatures of the metal-insulator transition over the whole range due to a cross coupling of the delocalized s and p states with low-energy excitations between the localized d states. This coupling can be understood by advanced calculations based on many-body perturbation theory in the GW approximation. We also advocate the fact that tuning the photon energy up to the hard X-ray range can help to distinguish fingerprints of correlation from pure bandstructure effects.
Fichier principal
Vignette du fichier
vo2satels.pdf (419.06 Ko) Télécharger le fichier
Origine : Fichiers éditeurs autorisés sur une archive ouverte

Dates et versions

hal-04429595 , version 1 (31-01-2024)

Identifiants

Citer

Matteo Gatti, Giancarlo Panaccione, Lucia Reining. Effects of low-energy excitations on spectral properties at higher binding energy: The metal-insulator transition of VO$_2$. Physical Review Letters, 2015, 114 (11), pp.116402. ⟨10.1103/PhysRevLett.114.116402⟩. ⟨hal-04429595⟩
14 Consultations
2 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More