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Resonant Soft-X-Ray Emission as a Bulk Probe of Correlated Electron Behavior in Metallic SrxCa1-xVO3

Laverock, J.; Chen, B.; Smith, K. E.; Singh, R. P.; Balakrishnan, G.; Gu, M.; Lu, J. W.; Wolf, S. A.; Qiao, R. M. and Yang, W., et al. (2013) In Physical Review Letters 111(4).
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 similar to 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 similar to 10% narrowing of the overall bandwidth at the surface is also observed.
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Physical Review Letters
volume
111
issue
4
publisher
American Physical Society
external identifiers
  • wos:000322218000012
  • scopus:84880905817
ISSN
1079-7114
DOI
10.1103/PhysRevLett.111.047402
language
English
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yes
id
f0ae4e15-6893-4c43-a5ee-90a5319e997b (old id 4042936)
date added to LUP
2013-10-04 14:40:58
date last changed
2019-04-30 01:05:34
@article{f0ae4e15-6893-4c43-a5ee-90a5319e997b,
  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 similar to 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 similar to 10% narrowing of the overall bandwidth at the surface is also observed.},
  articleno    = {047402},
  author       = {Laverock, J. and Chen, B. and Smith, K. E. and Singh, R. P. and Balakrishnan, G. and Gu, M. and Lu, J. W. and Wolf, S. A. and Qiao, R. M. and Yang, W. and Adell, Johan},
  issn         = {1079-7114},
  language     = {eng},
  number       = {4},
  publisher    = {American Physical Society},
  series       = {Physical Review Letters},
  title        = {Resonant Soft-X-Ray Emission as a Bulk Probe of Correlated Electron Behavior in Metallic SrxCa1-xVO3},
  url          = {http://dx.doi.org/10.1103/PhysRevLett.111.047402},
  volume       = {111},
  year         = {2013},
}