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Coherent peaks and minimal probing depth in photoemission spectroscopy of Mott-Hubbard systems
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2006 (English)In: Physical Review Letters, ISSN 0031-9007, Vol. 97, no 11Article in journal (Refereed) Published
Abstract [en]

We have measured hard x-ray photoemission spectra of pure vanadium sesquioxide (V2O3) 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 V2O3 (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.

Place, publisher, year, edition, pages
2006. Vol. 97, no 11
Keyword [en]
metal-insulator transitions, mean-field theory, cr-doped v2o3, infinite dimensions, limit, model
URN: urn:nbn:se:kth:diva-15991DOI: 10.1103/PhysRevLett.97.116401ISI: 000240545600047ScopusID: 2-s2.0-33748549925OAI: diva2:334033
QC 20100525Available from: 2010-08-05 Created: 2010-08-05Bibliographically approved

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Tjernberg, Oscar
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Material Physics, MF
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