We derive the effective action for superconducting fluctuations in a four-band model for pnictides, discussing the emergence of a single critical mode out of a dominant interband pairing mechanism. We then apply our model to calculate the paraconductivity in two-dimensional and layered three-dimensional systems and compare our results with recent resistivity measurements in SmFeAsO(0.8)F(0.2).
Theory of fluctuation conductivity from interband pairing in pnictide superconductors / Fanfarillo, L.; Benfatto, L.; Caprara, Sergio; Castellani, Claudio; Grilli, Marco. - In: PHYSICAL REVIEW. B, CONDENSED MATTER AND MATERIALS PHYSICS. - ISSN 1098-0121. - 79:17(2009), pp. 172508-1-172508-4. [10.1103/physrevb.79.172508]
Theory of fluctuation conductivity from interband pairing in pnictide superconductors
L. Benfatto;CAPRARA, SERGIO;CASTELLANI, Claudio;GRILLI, Marco
2009
Abstract
We derive the effective action for superconducting fluctuations in a four-band model for pnictides, discussing the emergence of a single critical mode out of a dominant interband pairing mechanism. We then apply our model to calculate the paraconductivity in two-dimensional and layered three-dimensional systems and compare our results with recent resistivity measurements in SmFeAsO(0.8)F(0.2).I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
