Point-contact Andreev reflection, heat capacity, and Hall-probe data consistently indicate two superconducting gaps in La3Se4, with large gap ratio 2Δ1/kBTc≈5.8 and small ratio ≈2.3.
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Two-gap superconductivity in the noncentrosymmetric La$_3$Se$_4$ compound
Point-contact Andreev reflection, heat capacity, and Hall-probe data consistently indicate two superconducting gaps in La3Se4, with large gap ratio 2Δ1/kBTc≈5.8 and small ratio ≈2.3.