Article Dans Une Revue Science Advances Année : 2021

Ultrafast dynamical Lifshitz transition

Résumé

Fermi surface is at the heart of our understanding of metals and strongly correlated many-body systems. An abrupt change in the Fermi surface topology, also called Lifshitz transition, can lead to the emergence of fascinating phenomena like colossal magnetoresistance and superconductivity. While Lifshitz transitions have been demonstrated for a broad range of materials by equilibrium tuning of macroscopic parameters such as strain, doping, pressure, and temperature, a nonequilibrium dynamical route toward ultrafast modification of the Fermi surface topology has not been experimentally demonstrated. Combining time-resolved multidimensional photoemission spectroscopy with state-of-the-art TDDFT+U simulations, we introduce a scheme for driving an ultrafast Lifshitz transition in the correlated type-II Weyl semimetal Td-MoTe2. We demonstrate that this nonequilibrium topological electronic transition finds its microscopic origin in the dynamical modification of the effective electronic correlations. These results shed light on a previously unexplored ultrafast scheme for controlling the Fermi surface topology in correlated quantum materials.

Fichier non déposé

Dates et versions

hal-03797101 , version 1 (04-10-2022)

Identifiants

Citer

Samuel Beaulieu, Shuo Dong, Nicolas Tancogne-Dejean, Maciej Dendzik, Tommaso Pincelli, et al.. Ultrafast dynamical Lifshitz transition. Science Advances , 2021, 7 (17), ⟨10.1126/sciadv.abd9275⟩. ⟨hal-03797101⟩
44 Consultations
0 Téléchargements

Altmetric

Partager

  • More