The nematicity induced d-symmetry charge density wave in electron-doped iron-pnictide superconductors

Chung Pin Chou, Hong Yi Chen, C. S. Ting

研究成果: 雜誌貢獻期刊論文同行評審

摘要

The interplay among the nematicity, the stripe spin-density-wave (SDW) order and superconductivity in iron-pnictides is studied in a self-consistent Bogoliubov-de Gennes equations. Our calculations have shown that the nematic-order breaks the degeneracy of dxz and dyz orbitals and causes the elliptic Fermi surface near the Γ point in the normal state. In addition, the appearance of the orthorhombic magnetic fluctuations generates two uneven pairs of peaks at (± π 0) and (0, ± π) in its Fourier transformation. All these are comparing favorably with experimental measurements. In the nematic phase, our results indicate that the charge density and its spatial image in the local density of states exhibit a dx2−y2-like symmetry. Finally, the complete phase diagram is obtained and the nematic phase is found to be in a narrow region close to the SDW transition in the electron-doped iron-pnictide superconductors.

原文英語
頁(從 - 到)61-67
頁數7
期刊Physica C: Superconductivity and its applications
546
DOIs
出版狀態已發佈 - 2018 三月 15

ASJC Scopus subject areas

  • 電子、光磁材料
  • 凝聚態物理學
  • 能源工程與電力技術
  • 電氣與電子工程

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