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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
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: |
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| 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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