Probing the intermediate state of type-I superconductor SnAs using Muon Spin Spectroscopy
Abstract
Superconductivity with non-trivial band topology provides a novel platform for exploring topological superconductivity and its quantum applications. A detailed microscopic understanding of the superconducting ground state in such materials is crucial. Here, we report the results of a muon spin rotation/relaxation study (μSR) of the topologically non-trivial superconductor SnAs, which exhibits superconductivity below 3.74(1) K. Zero-field (ZF) μSR data reveal that this system is a time-reversal invariant superconductor, and systematic transverse-field (TF) μSR measurements unveil the type-I nature of the SnAs superconductor. We have established the superconducting phase diagram to understand the intermediate state of type-I superconductors. Moreover, ab initio band structure and phonon calculations are performed, which correlate with the experimental characterization.
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