LaFeSiO1−δ : a novel superconducting member of the Fe crystallogenides family
Layered iron pnictides and chalcogenides materials are now a well-established class of unconventional superconductors. Few years ago, superconductivity was also discovered in LaFeSiH and where pnictogen/chalcogen atoms are replaced by crystallogen elements: Si, Ge. In this work we report the discovery of a novel superconducting crystallogenide, an unexpected high Tc value of 10 K considering its strongly squeezed Fe-Si layers. This iron silicide shows an original electronic band structure which suggests a different related superconducting mechanism than the ones found in pnictides/chalcogenides.
