Photoinduced renormalization of Dirac states in BaNiS$_2$ - Archive ouverte HAL Accéder directement au contenu
Pré-Publication, Document De Travail Année : 2020

Photoinduced renormalization of Dirac states in BaNiS$_2$

Niloufar Nilforoushan
Marco Caputo
  • Fonction : Auteur
Evangelos Papalazarou
  • Fonction : Auteur
Jonathan Caillaux
  • Fonction : Auteur
Zhesheng Cheng
  • Fonction : Auteur
Luca Perfetti
Adriano Amaricci
David Santos-Cottin
  • Fonction : Auteur
Yannick Klein
Andrea Gauzzi
Marino Marsi

Résumé

By means of pump-probe time- and angle-resolved photoelectron spectroscopy, we provide evidence of a sizeable reduction of the Fermi velocity of out-of-equilibrium Dirac bands in the quasi-two-dimensional semimetal BaNiS$_2$. First-principle calculations indicate that this band renormalization is ascribed to a change in non-local electron correlations driven by a photo-induced enhancement of screening properties. This effect is accompanied by a slowing down of the Dirac fermions and by a non-rigid shift of the bands at the center of the Brillouin zone. This result suggests that other similar electronic structure renormalizations may be photoinduced in other materials in presence of strong non-local correlations.
Fichier principal
Vignette du fichier
1912.13254.pdf (4.73 Mo) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)

Dates et versions

hal-03070498 , version 1 (15-12-2020)
hal-03070498 , version 2 (05-01-2021)

Identifiants

Citer

Niloufar Nilforoushan, Michele Casula, Marco Caputo, Evangelos Papalazarou, Jonathan Caillaux, et al.. Photoinduced renormalization of Dirac states in BaNiS$_2$. 2020. ⟨hal-03070498v1⟩
66 Consultations
56 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More