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


Abstract in English

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 {lambda}ep, superconducting energy gap {Delta}0, and the specific heat jump {Delta}C/{lambda}Tc at Tc confirms that PbTaSe2 can be categorized as a weakly coupled type-II superconductor.

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