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Microscopic investigation of the weakly correlated noncentrosymmetric superconductor <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msub><mml:mi>SrAuSi</mml:mi><mml:mn>3</mml:mn></mml:msub></mml:math>
SrAuSi$_3$ is a noncentrosymmetric superconductor (NCS) with $T_c$ = 1.54 K, which to date has been studied only via macroscopic techniques. By combining nuclear magnetic resonance (NMR) and muon-spin rotation ($\mu$SR) measurements we investigate both the normal and the superconducting phase of SrAuSi$_3$ at a local level. In the normal …