Title: Superconductivity and fluctuations in Ba1- pK pFe2As2 and Ba(Fe1- nCo n)2As2.
Authors: Böhm, T.; Hosseinian Ahangharnejhad, R.; Jost, D.; Baum, A.; Muschler, B.; Kretzschmar, F.; Adelmann, P.; Wolf, T.; Wen, H.‐H.; Chu, J.‐H.; Fisher, I. R.; Hackl, R.
Abstract: We study the interplay of fluctuations and superconductivity in BaFe2As2 (Ba-122) compounds with Ba and Fe substituted by K (p doping) and Co (n doping), respectively. To this end, we measured electronic Raman spectra as a function of polarization and temperature. We observe gap excitations and fluctuations for all doping levels studied. The response from fluctuations is much stronger for Co substitution and, according to the selection rules and the temperature dependence, originates from the exchange of two critical spin fluctuations with characteristic wave vectors
Subjects: METAL compounds; SUPERCONDUCTIVITY; FLUCTUATIONS (Physics); RAMAN spectra; ELECTRONIC spectra; SEMICONDUCTOR doping profiles
Publication: Physica Status Solidi (B), 2017, Vol 254, Issue 1, pn/a
ISSN: 0370-1972
Publication type: Academic Journal
DOI: 10.1002/pssb.201600308

Superconductivity and fluctuations in Ba<sub>1- p</sub>K<sub> p</sub>Fe<sub>2</sub>As<sub>2</sub> and Ba(Fe<sub>1- n</sub>Co<sub> n</sub>)<sub>2</sub>As<sub>2</sub>.

Böhm, T.; Hosseinian Ahangharnejhad, R.; Jost, D.; Baum, A.; Muschler, B.; Kretzschmar, F.; Adelmann, P.; Wolf, T.; Wen, H.‐H.; Chu, J.‐H.; Fisher, I. R.; Hackl, R.