Publications by authors named "Alexandros Deltsidis"
Two-dimensional iron chalcogenide intercalates display a remarkable correlation of the interlayer spacing with enhancement of the superconducting critical temperature (). 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 (∼44 K) in the molecule-intercalated Li(CHN)FeSe relates to the electronic and local structural changes felt by the inorganic host upon doping (). XES shows that widely separated layers of edge-sharing FeSe tetrahedra carry low-spin moieties, with a local Fe magnetic moment slightly reduced compared to the parent β-FeSe.
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- A study using time-resolved synchrotron X-ray total scattering investigated the structural changes during the intercalation of organic molecular donors in layered iron-selenide to create an expanded-lattice superconductor Li(CHN)FeSe.
- The results showed a tetragonal crystal structure with increased spacing between iron and selenium layers and identified local distortions in the FeSe tetrahedral environment, which were larger than in the original material.
- The findings emphasize the importance of reaction conditions, such as lithium concentration and aging time, in influencing the formation of secondary phases and highlight the structural characteristics necessary for achieving high superconducting properties in these materials.*