Study of the superconducting ground state of topological superconducting candidates Ti${}_3$X (X = Ir, Sb)

Abstract

The topologically non-trivial band structure of A15 compounds has drawn attention owing to the possible realization of topological superconductivity. Here, we report a microscopic investigation of the superconducting ground state in A15 compound Ti${}_3$X (X = Ir, Sb) by muon spectroscopy measurements. Zero field muon measurements have shown that time-reversal symmetry is preserved in these materials. Furthermore, specific heat and a transverse field muon spectroscopy measurement rule out any possibility to have a nodal or anisotropic superconducting gap, revealing a conventional s-wave nature in the superconducting ground state. This work classifies A15 compound Ti${}_3$X (X = Ir, Sb) as a time-reversal preserved topological superconductor.

7 pages, 9 figures

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Cited by in corpus (1)

• Superconducting ground state of nonsymmorphic superconducting compound Zr${}_2$Ir