Superconductivity in noncentrosymmetric YPtBi under pressure

T. V. Bay, T. Naka, Y. K. Huang, and A. de Visser
Phys. Rev. B 86, 064515 – Published 13 August 2012

Abstract

We report a high-pressure single-crystal study of the noncentrosymmetric superconductor YPtBi (Tc=0.77 K). Magnetotransport measurements show a weak metallic behavior with a carrier concentration n2.2×1019 cm3. Resistivity measurements up to p=2.51 GPa reveal superconductivity is promoted by pressure. The reduced upper critical field Bc2(T) curves collapse onto a single curve, with values that exceed the model values for spin-singlet superconductivity. The Bc2 data point to an odd-parity component in the superconducting order parameter, in accordance with predictions for noncentrosymmetric superconductors.

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  • Received 7 June 2012

DOI:https://doi.org/10.1103/PhysRevB.86.064515

©2012 American Physical Society

Authors & Affiliations

T. V. Bay1, T. Naka2, Y. K. Huang1, and A. de Visser1,*

  • 1Van der Waals - Zeeman Institute, University of Amsterdam, Science Park 904, 1098 XH Amsterdam, The Netherlands
  • 2National Institute for Materials Science, Sengen 1-2-1, Tsukuba, Ibaraki 305-0047, Japan

  • *a.devisser@uva.nl

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Issue

Vol. 86, Iss. 6 — 1 August 2012

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