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Li<sub><i>x</i></sub>(C<sub>5</sub>H<sub>5</sub>N)<sub><i>y</i></sub>Fe<sub>2–<i>z</i></sub>Se<sub>2</sub>: A Defect-Resilient Expanded-Lattice High-Temperature Superconductor
Two-dimensional iron chalcogenide intercalates display a remarkable correlation of the interlayer spacing with enhancement of the superconducting critical temperature (Tc). In this work, synchrotron X-ray absorption (XAS; at the Fe and Se K-edges) and emission (XES; at the Fe Κβ) spectroscopies allow one to discuss how the important rise of …