Crystal structure determination of the topological and nematic superconductor SrxBi2Se3
Doping Cu, Nb or Sr into the topological insulator Bi2Se3 results in superconducting states that are proposed to be topological as well. The superconducting properties in all three materials break the threefold rotation axis of the parent compound pointing to a nematic state. In spite of these highly interesting superconducting states very little is known about the crystal structure of these materials, because samples for X-ray studies could not be cut. Our previous neutron single-crystal experiment on the Cu-doped material showed that Cu is not intercalating and gave weak evidence for a structural distortion already in the normal state. We propose to analyse the crystal structure for another dopant, Sr, to support our conclusions for this important class of materials.
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M. Braden; AYAPE KATCHO Nebil and BERTIN Alexandre. (2020). Crystal structure determination of the topological and nematic superconductor SrxBi2Se3. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.5-14-272
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