Journal Article Superconductivity in noncentrosymmetric Ag2Pd3S

Yoshida, H.  ,  Okabe, H.  ,  Matsushita, Y.  ,  Isobe, M.  ,  Takayama-Muromachi, E.

95 ( 18 )  , p.184514 , 2017-05-22 , American Physical Society (APS)
We have successfully synthesized the single crystal of Ag2Pd3S, which exhibits superconductivity with the transition temperature of T-c = 2.25 K. Ag2Pd3S crystallizes in the space group P4(1)32 with the filled beta-Mn structure, which has no inversion symmetry. The value of the Ginzburg-Landau parameter.GL indicates that Ag2Pd3S is a type-II superconductor. Delta C(T-c)gamma T-n(c) = 1.50 and 2 Delta/k(B)T(c) = 3.48 from the heat-capacity analyses indicate that Ag2Pd3S is a weak-coupling Bardeen-Cooper-Schrieffer (BCS) superconductor with an isotropic superconducting gap. On the other hand, the violation of the Werthamer-Helfand-Hohenberg curve in the H-T phase diagram implies Ag2Pd3S is not a typical BCS superconductor.

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