Photoinduced renormalization of Dirac states in BaNiS${}_2$

Abstract

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.

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Cited by in corpus (7)

• Time- and Angle-Resolved Photoemission Studies of Quantum Materials
• Advancing time- and angle-resolved photoemission spectroscopy: The role of ultrafast laser development
• Optical conductivity signatures of open Dirac nodal lines
• Correlation-driven electronic nematicity in the Dirac semimetal BaNiS2
• Photo-induced Dirac cone flattening in BaNiS${}_2$
• Dichroism in time-resolved ARPES and valence band orbital nature in BaNiS2
• Light-induced renormalization of the band structure of chiral tellurium