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Article Dans Une Revue Science Advances Année : 2021

Imaging the itinerant-to-localized transmutation of electrons across the metal-to-insulator transition in V O 3

Min-Han Lee
Emma David
Emmanouil Frantzeskakis
  • Fonction : Auteur
  • PersonId : 1333328
  • IdHAL : emmfran
Nicolas M Vargas
Yoav Kalcheim
Patrick Le Fèvre
Koji Horiba
KEK
Hiroshi Kumigashira
KEK
Ivan K Schuller

Résumé

In solids, strong repulsion between electrons can inhibit their movement and result in a "Mott" metal-to-insulator transition (MIT), a fundamental phenomenon whose understanding has remained a challenge for over 50 years. A key issue is how the wave-like itinerant electrons change into a localized-like state due to increased interactions. However, observing the MIT in terms of the energy-and momentum-resolved electronic structure of the system, the only direct way to probe both itinerant and localized states, has been elusive. Here we show, using angleresolved photoemission spectroscopy (ARPES), that in V 2 O 3 , the temperature-induced MIT is characterized by the progressive disappearance of its itinerant conduction band, without any change in its energy-momentum dispersion, and the simultaneous shift to larger binding energies of a quasi-localized state initially located near the Fermi level.
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Dates et versions

hal-03451380 , version 1 (26-11-2021)

Identifiants

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Maximilian Thees, Min-Han Lee, Rosa Luca Bouwmeester, Pedro H Rezende-Gonçalves, Emma David, et al.. Imaging the itinerant-to-localized transmutation of electrons across the metal-to-insulator transition in V O 3. Science Advances , 2021, 7 (45), ⟨10.1126/sciadv.abj1164⟩. ⟨hal-03451380⟩
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