Disentangling the surface and bulk electronic structures of LaOFeAs

P. Zhang; J. Ma; T. Qian; Y. G. Shi; A. V. Fedorov; J. D. Denlinger; X. X. Wu; J. P. Hu; P. Richard; H. Ding

doi:10.1103/PhysRevB.94.104517

Disentangling the surface and bulk electronic structures of LaOFeAs

Superconductivity 2016-09-26 v1 Strongly Correlated Electrons

Authors: P. Zhang , J. Ma , T. Qian , Y. G. Shi , A. V. Fedorov , J. D. Denlinger , X. X. Wu , J. P. Hu , P. Richard , H. Ding

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Abstract

We performed a comprehensive angle-resolved photoemission spectroscopy study of the electronic band structure of LaOFeAs single crystals. We found that samples cleaved at low temperature show an unstable and highly complicated band structure, whereas samples cleaved at high temperature exhibit a stable and clearer electronic structure. Using \emph{in-situ} surface doping with K and supported by first-principles calculations, we identify both surface and bulk bands. Our assignments are confirmed by the difference in the temperature dependence of the bulk and surface states.

Keywords

electronic structure surface science crystal growth and phase transitions

Cite

@article{arxiv.1606.01033,
  title  = {Disentangling the surface and bulk electronic structures of LaOFeAs},
  author = {P. Zhang and J. Ma and T. Qian and Y. G. Shi and A. V. Fedorov and J. D. Denlinger and X. X. Wu and J. P. Hu and P. Richard and H. Ding},
  journal= {arXiv preprint arXiv:1606.01033},
  year   = {2016}
}

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5 pages, 5 figures

Disentangling the surface and bulk electronic structures of LaOFeAs

Abstract

Keywords

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