Surface dead layer for quasiparticles near a mott transition.
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. The photoemission data of Rodolakis et al. [Phys. Rev. Lett. 102, 066805 (2009)] in V2O3 appear to be in accord with this physical picture.
Borghi
Giovanni
G
International School for Advanced Studies (SISSA), and CRS Democritos, CNR-INFM, Via Beirut 2-4, I-34014 Trieste, Italy.
Fabrizio
Michele
M
Tosatti
Erio
E