Observation of dirac cone electronic dispersion in BaFe2As2

P. Richard, K. Nakayama, T. Sato, M. Neupane, Y. M. Xu, J. H. Bowen, G. F. Chen, J. L. Luo, N. L. Wang, X. Dai, Z. Fang, H. Ding, T. Takahashi

研究成果: Article査読

207 被引用数 (Scopus)

抄録

We performed an angle-resolved photoemission spectroscopy study of BaFe2As2, which is the parent compound of the so-called 122 phase of the iron-pnictide high-temperature superconductors. We reveal the existence of a Dirac cone in the electronic structure of this material below the spin-density-wave temperature, which is responsible for small spots of high photoemission intensity at the Fermi level. Our analysis suggests that the cone is slightly anisotropic and its apex is located very near the Fermi level, leading to tiny Fermi surface pockets. The bands forming the cone show an anisotropic leading edge gap away from the cone that suggests a nodal spin-density-wave description.

本文言語English
論文番号137001
ジャーナルPhysical review letters
104
13
DOI
出版ステータスPublished - 2010 3月 29
外部発表はい

ASJC Scopus subject areas

  • 物理学および天文学(全般)

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