Surface dead layer for quasiparticles near a Mott transition

Abstract

Electron quasiparticles are progressively weakened by correlations upon approaching a continuos Mott metal insulator transition in a bulk solid. We show that corresponding to the bulk weakening, a dead layer forms below the surface of the solid, where quasiparticles are exponentially suppressed. The surface dead layer depth is a bulk property, and diverges when the Mott transition is approached. We describe this phenomenon in a Hubbard model within a self-consistent Gutzwiller approximation. Photoemission data of Rodolakis et al. in V2O3 appear to be in accord with this physical picture.

5 pages, 3 figures, to appear in Physical Review Letters

References in corpus (6)

• Enhanced Crystal Field Splitting and Orbital Selective Coherence by Strong Correlations in V_2O_3
• Bulk screening in core level photoemission from Mott-Hubbard and Charge-Transfer systems
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Cited by in corpus (1)

• Influence of the vacuum interface on the charge distribution in V2O3 thin films