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Multiband superconductivity in <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msub><mml:mi mathvariant="normal">V</mml:mi><mml:mn>3</mml:mn></mml:msub><mml:mi>Si</mml:mi></mml:math> determined from studying the response to controlled disorder
The London penetration depth $\ensuremath{\lambda}(T)$ was measured in a single crystal of ${\mathrm{V}}_{3}\mathrm{Si}$. The superfluid density obtained from this measurement shows a distinct signature of two almost decoupled superconducting gaps. This alone is insufficient to distinguish between ${s}_{\ifmmode\pm\else\textpm\fi{}}$ and ${s}_{++}$ pairing states, but it can be achieved by studying the …