]>Lattice Instability in High Temperature Superconducting Cuprates and FeAs Systems: Polarons Probed by EXAFS : Figure 1
484578.fig.001a
(a)
484578.fig.001b
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Figure 1: In-plane structure of the conducting layer in LaFeAs O 1 − 𝑥 F 𝑥 (a) and L a 1 − 𝑥 S r 𝑥 Cu O 4 (b). Use of polarization dependence (E//ab) XAS measurement can probe the planar local lattice projected onto the 𝑎 𝑏 -plane.