Probing the intermediate state of type-I superconductor SnAs using Muon Spin Spectroscopy

Shashank Srivastava; Omkar Kulkarni; Arushi; Deepak Singh; Poulami Manna; Priya Mishra; Suhani Sharma; Pabitra Kumar Biswas; Rhea Stewart; Adrian D. Hillier; Ravi Prakash Singh

arXiv · 2512.17282

Probing the intermediate state of type-I superconductor SnAs using Muon Spin Spectroscopy

Shashank Srivastava·Omkar Kulkarni·Arushi·Deepak Singh·Poulami Manna·Priya Mishra·Suhani Sharma·Pabitra Kumar Biswas·Rhea Stewart·Adrian D. Hillier·Ravi Prakash Singh

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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 ($\mu$SR) of the topologically non-trivial superconductor SnAs, which exhibits superconductivity below 3.74(1) \si{K}. Zero-field (ZF) $\mu$SR data reveal that this system is a time-reversal invariant superconductor, and systematic transverse-field (TF) $\mu$SR 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 \textit{initio} band structure and phonon calculations are performed, which correlate with the experimental characterization.

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Shashank Srivastava, Omkar Kulkarni, Arushi, Deepak Singh, Poulami Manna, Priya Mishra, Suhani Sharma, Pabitra Kumar Biswas, Rhea Stewart, Adrian D. Hillier, Ravi Prakash Singh. 2025-12-19. Probing the intermediate state of type-I superconductor SnAs using Muon Spin Spectroscopy. https://arxiv.org/abs/2512.17282

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