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arXiv · 1511.05295

Single crystal growth and physical property characterization of PbTaSe2 as a noncentrosymmetric type-II superconductor

Raman Sankar·G. Narsinga Rao·I. Panneer Muthuselvam·Guang Bian·Hao Zheng·G. Peng-Jen Chen·Tay-Rong Chang·Suyang Xu·G. Senthil Murgan·Chun-Hsuan Lin·Wei-Li Lee·Horng-Tay Jeng·M. Zahid Hasan·Fang-Cheng Chou
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Abstract

The single crystal growth and superconducting properties of PbTaSe2 with non-centrosymmetric crystal structure is reported. Using the chemical vapor transport (CVT) technique, PbTaSe2 crystallizes in a layered structure and the crystal symmetry has been shown belonging to a non-centrosymmetric space group P6-m2 confirmed by the consistent band picture near the Fermi level between the angle-resolved photoemission spectrum (ARPES) and theoretical calculations. Superconductivity with Tc =3.83 K has been characterized fully with electrical resistivity \r{ho}(T), magnetic susceptibility \c{hi}(T), and specific heat C(T) measurements using single crystal samples. The superconducting anisotropy, electron-phonon coupling λep, superconducting energy gap Δ0, and the specific heat jump ΔC/λTc at Tc confirms that PbTaSe2 can be categorized as a weakly coupled type-II superconductor.

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Raman Sankar, G. Narsinga Rao, I. Panneer Muthuselvam, Guang Bian, Hao Zheng, G. Peng-Jen Chen, Tay-Rong Chang, Suyang Xu, G. Senthil Murgan, Chun-Hsuan Lin, Wei-Li Lee, Horng-Tay Jeng, M. Zahid Hasan, Fang-Cheng Chou. 2015-11-17. Single crystal growth and physical property characterization of PbTaSe2 as a noncentrosymmetric type-II superconductor. https://arxiv.org/abs/1511.05295

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