Abstract
The evolution of electron correlation in SrxCa 1-xVO3 has been studied using a combination of bulk-sensitive resonant soft x-ray emission spectroscopy, surface-sensitive photoemission spectroscopy, and ab initio band structure calculations. We show that the effect of electron correlation is enhanced at the surface. Strong incoherent Hubbard subbands are found to lie ∼20% closer in energy to the coherent quasiparticle features in surface-sensitive photoemission spectroscopy measurements compared with those from bulk-sensitive resonant soft x-ray emission spectroscopy, and a ∼10% narrowing of the overall bandwidth at the surface is also observed.
Original language | English |
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Article number | 047402 |
Journal | Physical Review Letters |
Volume | 111 |
Issue number | 4 |
DOIs | |
Publication status | Published - 24 Jul 2013 |