Domain walls in normal and superconducting states of iron pnictides
Huaixiang Huang, Degang Zhang, Tao Zhou, C. S. Ting
DOI 10.1103/PhysRevB.83.134517 · Physical Review B
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Abstract
The electronic and magnetic structures in the normal and superconducting states of iron pnictides are investigated by solving self-consistently the Bogoliubov–de Gennes equation. It is shown that strong electron correlations can induce domain walls, which separate the regions with different spin density wave orders. At zero or low electron doping, 90° domain walls are robust against the on-site Coulomb interaction and Hund coupling. On the domain walls, there always exist larger electron densities. The results agree qualitatively with recent observations of scanning tunneling microscopy and superconducting quantum interference device microscopy in underdoped (Ba,Ca)(Fe1−xCox)2As2.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Ca(Fe1-xCox)2As2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| Ba(Fe1-xCox)2As2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
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