# μSR study of the noncentrosymmetric superconductor PbTaSe2 Academic Article

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### abstract

• We present muon spin rotation ($\mu$SR) measurements on the noncentrosymmetric superconductor PbTaSe$_2$. From measurements in an applied transverse field between $H_{c1}$ and $H_{c2}$, we extract the superfluid density as a function of temperature in the vortex state. This data can be fit with a fully gapped two-band model, consistent with previous evidence from ARPES, thermal conductivity, and resistivity. Furthermore, zero field measurements show no evidence for a time reversal symmetry breaking field greater than 0.05~G in the superconducting state. This makes exotic fully gapped spin-triplet states unlikely, and hence we contend that PbTaSe$_2$ is characterized by conventional BCS s-wave superconductivity in multiple bands.

• Wilson, MN
• Hallas, AM
• Cai, Y
• Guo, S
• Gong, Z
• Sankar, R
• Chou, FC
• Uemura, YJ
• Luke, Graeme

• June 8, 2017