The reason why doping causes superconductivity in LaFeAsO

Abstract

The experimental observation of superconductivity in LaFeAsO appearing on doping is analyzed with the group-theoretical approach that evidently led in a foregoing paper (J. Supercond 24:2103, 2011) to an understanding of the cause of both the antiferromagnetic state and the accompanying structural distortion in this material. Doping, like the structural distortions, means also a reduction of the symmetry of the pure perfect crystal. In the present paper we show that this reduction modifies the correlated motion of the electrons in a special narrow half-filled band of LaFeAsO in such a way that these electrons produce a stable superconducting state.

References in corpus (5)

• Magnetic Order versus superconductivity in the Iron-based layered La(O1-xFx)FeAs systems
• Superconductivity at 43 K in Samarium-arsenide Oxides $SmFeAs{O}_{1-x}{F}_x$
• Competing Orders and Spin-Density-Wave Instability in La(O${}_{1-x}$F${}_x$)FeAs
• Crystallographic Phase Transition and High-Tc Superconductivity in LaFeAsO:F
• Crystal structure and phase transitions across the metal-superconductor boundary in the SmFeAsO1-xFx (0 < x < 0.20) family

Cited by in corpus (3)

• Group theory of Wannier functions providing the basis for a deeper understanding of magnetism and superconductivity
• Magneto-Transport Properties of Single Crystalline LaFeAsO
• Structural distortion in antiferromagnetic BaFe2As2 as a result of time-inversion symmetry