Imaging the itinerant-to-localized transmutation of electrons across the metal-to-insulator transition in V2O3

Maximilian Thees, Min-Han Lee, Rosa Luca Bouwmeester, Pedro H. Rezende-Gonçalves, Emma David, Alexandre Zimmers, Franck Fortuna, Emmanouil Franzeskakis, Nicolas M. Vargas, Yoav Kalcheim, Patrick Le Fèvre, Koji Horiba, Hiroshi Kumigashira, Silke Biermann, Juan Trastoy, Marcelo J. Rozenberg, Ivan K. Schuller, Andrés F. Santander-Syro*

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

Abstract

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 angle-resolved photoemission spectroscopy (ARPES), that in V2O3, 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.
Original languageEnglish
Article numbereabj1164
Number of pages7
JournalScience advances
Volume7
Issue number45
DOIs
Publication statusPublished - 3 Nov 2021

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