Local structure and phonon states mediated by intercalation-driven
doping in superconducting $Li_{1.0}(C_5H_5N)_yFe_{2-z}Se_2$
Local structure and phonon states mediated by intercalation-driven
doping in superconducting $Li_{1.0}(C_5H_5N)_yFe_{2-z}Se_2$
Intercalation of two-dimensional (2D) iron chalcogenides with molecular species requires disentangling electronic and structural contributions to understand the puzzling limit to superconducting transition temperature ($T_c$) at the frontier of long interlayer separations. Here, synchrotron X-ray absorption spectroscopy (XAS) at the Se K-edge sheds light on the impact of carrier-doping on …