Orbital-Dependent modifications of electronic structure across the magnetostructural 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

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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 magnetostructural transition at TN∼140K. 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∼π in the low-T antiferromagnetic state are dominated by the Fe3dzx orbital, leading to the twofold electronic structure. These results indicate that magnetostructural transition in BaFe2As2 accompanies orbital-dependent modifications in the electronic structure.

Original languageEnglish
Article number057002
JournalPhysical review letters
Volume104
Issue number5
DOIs
Publication statusPublished - 2010 Feb 3

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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    Shimojima, T., Ishizaka, K., Ishida, Y., Katayama, N., Ohgushi, K., Kiss, T., Okawa, M., Togashi, T., Wang, X. Y., Chen, C. T., Watanabe, S., Kadota, R., Oguchi, T., Chainani, A., & Shin, S. (2010). Orbital-Dependent modifications of electronic structure across the magnetostructural transition in BaFe2As2. Physical review letters, 104(5), [057002]. https://doi.org/10.1103/PhysRevLett.104.057002