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Resonant soft-X-Ray emission as a bulk probe of correlated electron behavior in metallic Sr_{x}Ca_{1-x}VO_{3}

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Laverock, J., Chen, B., Smith, K. E., Singh, R. P., Balakrishnan, G., Gu, M., Lu, J. W., Wolf, S. A., Qiao, R. M., Yang, W. and Adell, J. (2013) Resonant soft-X-Ray emission as a bulk probe of correlated electron behavior in metallic Sr_{x}Ca_{1-x}VO_{3}. Physical Review Letters, Volume 111 (Number 4). Article number 047402. doi:10.1103/PhysRevLett.111.047402

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Official URL: http://dx.doi.org/10.1103/PhysRevLett.111.047402

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Abstract

The evolution of electron correlation in SrxCa1-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.

Item Type: Journal Article
Divisions: Faculty of Science > Physics
Journal or Publication Title: Physical Review Letters
Publisher: American Physical Society
ISSN: 0031-9007
Official Date: 26 July 2013
Dates:
DateEvent
26 July 2013Published
Volume: Volume 111
Number: Number 4
Page Range: Article number 047402
DOI: 10.1103/PhysRevLett.111.047402
Status: Peer Reviewed
Publication Status: Published
Access rights to Published version: Restricted or Subscription Access

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