Orbital-dependent modifications of electronic structure across magneto-structural transition in BaFe2As2

T. Shimojima; K. Ishizaka; Y. Ishida; N. Katayama; K. Ohgushi; T. Kiss; M. Okawa; T. Togashi; X. -Y. Wang; C. -T. Chen; S. Watanabe; R. Kadota; T. Oguchi; A. Chainani; S. Shin

doi:10.1103/PhysRevLett.104.057002

Orbital-dependent modifications of electronic structure across magneto-structural transition in BaFe2As2

Superconductivity 2015-05-13 v2 Strongly Correlated Electrons

Authors: T. Shimojima , K. Ishizaka , Y. Ishida , N. Katayama , K. Ohgushi , T. Kiss , M. Okawa , T. Togashi , X. -Y. Wang , C. -T. Chen , S. Watanabe , R. Kadota , T. Oguchi , A. Chainani , S. Shin

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Abstract

Laser angle-resolved photoemission spectroscopy (ARPES) is employed to investigate the temperature (T) dependence of the electronic structure in BaFe2As2 across the magneto-structural transition at TN ~ 140 K. A drastic transformation in Fermi surface (FS) shape across TN is observed, as expected by first-principles band calculations. Polarization-dependent ARPES and band calculations consistently indicate that the observed FSs at kz ~ pi in the low-T antiferromagnetic (AF) state are dominated by the Fe3dzx orbital, leading to the two-fold electronic structure. These results indicate that magneto-structural transition in BaFe2As2 accompanies orbital-dependent modifications in the electronic structure.

Keywords

BaFe2As2 magneto-structural transition electronic structure orbital-dependent angle-resolved photoemission spectroscopy Fermi surface antiferromagnetic state

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@article{arxiv.0904.1632,
  title  = {Orbital-dependent modifications of electronic structure across magneto-structural transition in BaFe2As2},
  author = {T. Shimojima and K. Ishizaka and Y. Ishida and N. Katayama and K. Ohgushi and T. Kiss and M. Okawa and T. Togashi and X. -Y. Wang and C. -T. Chen and S. Watanabe and R. Kadota and T. Oguchi and A. Chainani and S. Shin},
  journal= {arXiv preprint arXiv:0904.1632},
  year   = {2015}
}

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13 pages, 4 figures. accepted by Physical Review Letters

Orbital-dependent modifications of electronic structure across magneto-structural transition in BaFe2As2

Abstract

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