Anisotropic vortex core in the nematic state in electron-doped iron-pnictide superconductors

Hong Yi Chen*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


We investigated the vortex states in the electron-doped BaFe1.8Co0.2As2 using Bogoliubov-de Gennes equations, based on a phenomenological model with competing nematic order and extended s-wave superconductivity. Specifically, we considered the spin-driven nematic order for the optimally doped compound. Our findings suggest that there are no Andreev bound states at the Fermi energy in the nematic phase, and the local density of states exhibits a double-peak structure, consistent with scanning tunneling microscopy experiments. Moreover, we propose an elliptic vortex structure in the local density of states map, which we attribute to the presence of the nematic order.

Original languageEnglish
Article number1354282
JournalPhysica C: Superconductivity and its applications
Publication statusPublished - 2023 Jul 15


  • BdG equations
  • Nematic state
  • Vortex core

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering


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