Lattice Instability in High Temperature Superconducting Cuprates and FeAs Systems: Polarons Probed by EXAFS
Figure 2
(a) The Fe K- and As K-edge EXAFS oscillations for LaFeAs () plotted as a function of photoelectron wave number . Red and green marks indicate the data measured at 300 K and 10 K, respectively, with a fluorescence detection mode. (b) Fourier transform magnitude functions for the same data. Red marks indicate the simulated (fitted) curve and black marks represent the experimental data. Green marks denote the experimental nearest neighbour contribution while blue marks represent theoretical calculation for the nearest neighbour Fe-As correlations, taken from [10].
