Superconductivity in Pseudo-Binary Silicide SrNixSi2-x with AlB2-Type Structure

Details Superconductivity in Pseudo-Binary Silicide SrNixSi2-x with AlB2-Type Structure Superconductivity in Pseudo-Binary Silicide SrNixSi2-x with AlB2-Type Structure

2012-01-05

arxiv.org/abs/1201.1070v1

J. Phys. Soc. Jpn. 81 (2012) 023702

Physics

Condensed Matter

Superconductivity

12 pages, 5 figures

Scientific paper

10.1143/JPSJ.81.023702

We demonstrate the emergence of superconductivity in pseudo-binary silicide SrNixSi2-x. The compound exhibits a structural phase transition from the cubic SrSi2-type structure (P4132) to the hexagonal AlB2-type structure (P6/mmm) upon substituting Ni for Si at approximately x = 0.1. The hexagonal structure is stabilized in the range of 0.1 < x < 0.7. The superconducting phase appears in the vicinity of the structural phase boundary. Ni acts as a nonmagnetic dopant, as confirmed by the Pauli paramagnetic behavior.

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