Speaker
Dorota Walicka
(Department of Chemistry and Department of Physics, University of Zürich)
Description
CaAlSi and SrAlSi are ternary superconductors that crystallize in AlB2-type structures with critical temperatures of Tc = 8 K, and 5 K, respectively. They surprisingly differ in properties among each other although they have similar electronic structures, and only a small difference in their crystallographic structures. We have in a systematic approach analyzed the Ca1-xSrxAlSi solid solution and its evolution of the electronic and structural properties. We find that the superconductivity in this system is closely connected to the appearance of the structural distortion of the [AlSi]62- layers. Based on our results we establish the electronic phase diagram and compare it to the one of MgB2.
Authors
Dorota Walicka
(Department of Chemistry and Department of Physics, University of Zürich)
Jorge Lago
(University of Zürich & Univ. del Pais Vasco)
Dr
Fabian O. von Rohr
(University of Zurich)
