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Unconventional superconducting properties of noncentrosymmetric <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msub><mml:mrow><mml:mi>Re</mml:mi></mml:mrow><mml:mrow><mml:mn>5.5</mml:mn></mml:mrow></mml:msub><mml:mi>Ta</mml:mi></mml:math>
Rhenium based noncentrosymmetric superconductors crystallizing in $\ensuremath{\alpha}$-Mn structure have become potential candidates to exhibit an unconventional superconducting ground state. Here we report a detailed investigation on the superconducting and normal state properties of ${\mathrm{Re}}_{5.5}\mathrm{Ta}$, that also has the $\ensuremath{\alpha}$-Mn structure. Magnetization, specific heat, and transport measurements confirm the bulk superconducting …