Enhanced Orbital Degeneracy in Momentum Space for LaOFeAs

@inproceedings{Zhang2008EnhancedOD,
  title={Enhanced Orbital Degeneracy in Momentum Space for LaOFeAs},
  author={H. Zhang and G. Xu and X. Dai and Z. Fang},
  year={2008}
}
  • H. Zhang, G. Xu, +1 author Z. Fang
  • Published 2008
  • Physics
  • The Fermi surfaces (FS) of LaOFeAs (in kz=0 plane) consist of two hole-type circles around Γ point, which do not touch each other, and two electron-type co-centered ellipses around M point, which are degenerate along the M-X line. By first-principles calculations, here we show that additional degeneracy exists for the two electron-type FS, and the crucial role of F-doping and pressure is to enhance this orbital degeneracy. It is suggested that the inter-orbital fluctuation is the key point to… CONTINUE READING
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