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 Frantzeskakis, 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

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Sammanfattning

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.

Originalspråkengelska
Artikelnummereabj1164
TidskriftScience Advances
Volym7
Utgåva45
DOI
StatusPublished - 2021

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