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Three-band s+- Eliashberg theory and the superconducting gaps of iron pnictides | | G. A. Ummarino
; M. Tortello
; D. Daghero
; R. S. Gonnelli
; | | Date: |
11 Apr 2009 | | Abstract: | The experimental critical temperatures and gap values of the superconducting
pnictides of both the 1111 and 122 families can be simultaneously reproduced
within the Eliashberg theory by using a three-band model where the dominant
role is played by interband interactions and the order parameter undergoes a
sigh reversal between hole and electron bands (s+- wave symmetry). High values
of the electron-boson coupling constants and small typical boson energies (in
agreement with experiments) are necessary to obtain the values of all the gaps
and to correctly reproduce their temperature dependence. | | Source: | arXiv, 0904.1808 | | Services: | Forum | Review | PDF | Favorites | |
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