Theory of fluctuation conductivity from interband pairing in pnictide superconductors
L. Fanfarillo, L. Benfatto, S. Caprara, C. Castellani, and M. Grilli
TL;DR
This paper develops a theoretical model for superconducting fluctuations in pnictides, focusing on interband pairing, and compares the calculated paraconductivity with experimental data.
Contribution
It introduces a four-band model capturing a single critical mode from interband pairing and applies it to calculate and compare paraconductivity with experiments.
Findings
Derived effective action for fluctuations in a four-band model
Identified a single critical mode from interband pairing
Calculated paraconductivity consistent with experimental measurements
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 SmFeAsOF
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