Investigation of microscopic superconducting properties of topological semimetal MPtSi (M = Nb, Ta)

Topological materials have garnered significant attention in condensed matter physics for their unique surface states with Z2 topological properties. Recent discoveries have unveiled superconductivity with time-reversal symmetry breaking in materials like (Ta, Nb)OsSi, while observing Z2 topological features coexisting with superconductivity in layered kagome structures like AV3Sb5. This study focuses on the isostructural similarities between MPtSi and (Ta, Nb)OsSi, to shed light on the intricate interplay between topology and superconductivity. The proposed μSR study will explore internal fields, penetration depth, and superconducting gap symmetry, providing a comprehensive understanding of the superconducting state in MPtSi.