Abstract

The superconductivity in LaPd2Al2−xGax compounds was studied by means of electrical resistivity and specific heat measurements. The concentration development of the superconducting properties was revealed. The measured data deviate significantly from the Bardeen–Cooper–Schrieffer theory predictions and are discussed in the context of unconventional superconductivity. The electronic specific heat below follows almost quadratic temperature dependence, which might indicate an axial state with line nodes in the superconducting gap structure.

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