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TT: Fachverband Tiefe Temperaturen
TT 36: SC: Fe-based Superconductors - 122 - Properties, Electronic Structure, Mechanisms
TT 36.13: Talk
Wednesday, March 16, 2011, 17:30–17:45, HSZ 304
Unconventional Raman scattering in the line node superconductor BaFe2(As1−xPx)2 — •Peter Lemmens1, Vladimir Gnezdilov1,2, Yurii Pashkevich3, Sergei Gnatchenko2, Shiregu Kasahara4, and Yuji Matsuda4 — 1IPKM, TU-BS, Braunschweig, Germany — 2ILTPE NAS, Ukraine — 3DonFTI NAS, Ukraine — 4Dep. of Phys., Kyoto University, Japan
The phase diagram of the system BaFe2(As1−xPx)2 is probed using Raman scattering. We observe a breakdown of selection rules and a pronounced effect of the folding back of the energy versus wave vector of dispersion curves in the non-Fermi liquid regime. This behavior contrasts with the observation of quantum oscillations in magneto transport. Possible mechanisms of such unexpected behavior are discussed.
Work supported by DFG.