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Updated: Jul 19, 2026

Angle-resolved Photoemission Spectroscopy At Ultra-low Temperatures
Published on: October 9, 2012
Coherent peaks and minimal probing depth in photoemission spectroscopy of Mott-Hubbard systems
G Panaccione1, M Altarelli, A Fondacaro
1TASC Laboratory, INFM-CNR, in Area Science Park, S.S.14, Km 163.5, I-34012 Trieste, Italy.
Abstract:
We have measured hard x-ray photoemission spectra of pure vanadium sesquioxide (V(2)O(3)) across its metal-insulator transition. We show that, in the metallic phase, a clear correlation exists between the shakedown satellites observed in the vanadium 2p and 3p core-level spectra and the coherent peak measured at the Fermi level. Comparing experimental results and dynamical mean-field theory calculations, we estimate the Hubbard energy U in V(2)O(3) (4.20+/-0.05 eV). From our bulk-sensitive photoemission spectra we infer the existence of a critical probing depth for investigating electronic properties in strongly correlated solids.
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