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arXiv · 1206.3758

Superconductivity in non-centrosymmetric YPtBi under pressure

T. V. Bay·T. Naka·Y. K. Huang·A. de Visser
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Abstract

We report a high-pressure single-crystal study of the non-centrosymmetric superconductor YPtBi ($T_c = 0.77$ K). Magnetotransport measurements show a weak metallic behavior with a carrier concentration $n \simeq 2.2 \times 10^{19}$ cm$^{-3}$. Resistivity measurements up to $p = 2.51$ GPa reveal superconductivity is promoted by pressure. The reduced upper critical field $B_{c2}(T)$ curves collapse onto a single curve, with values that exceed the model values for spin-singlet superconductivity. The $B_{c2}$ data point to an odd-parity component in the superconducting order parameter, in accordance with predictions for non-centrosymmetric superconductors.

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T. V. Bay, T. Naka, Y. K. Huang, A. de Visser. 2012-06-17. Superconductivity in non-centrosymmetric YPtBi under pressure. https://doi.org/10.1103/physrevb.86.064515

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