Superconductivity in the Honeycomb-Lattice Pnictide SrPtAs

Abstract

We report superconductivity in the honeycomb-lattice pnictide SrPtAs with Tc = 2.4 K. To our knowledge, SrPtAs is the first superconducting pnictide with a honeycomb lattice structure. Our finding opens up new playground to develop pnictide superconductors with honeycomb lattices, in addition to square lattices known in iron-based superconductors.Comment: 2 pages, 3 figure

Multigap superconductivity in locally noncentrosymmetric SrPtAs: AnAs75nuclear quadrupole resonance investigation

“…SrPtAs exhibits superconductivity below T c ≈ 2.4 K without doping, as recently found by Nishikubo et al 2 SrPtAs crystallizes in a hexagonal structure of weakly coupled non-centrosymmetric PtAs-layers, in which the charge transport takes place. Adjacent PtAs-layers are inverted to each other, so that the bulk is indeed centrosymmetric.…”

Role of strong spin-orbit coupling in the superconductivity of the hexagonal pnictide SrPtAs

“…In this work we show that this is not the case. In particular, we show that in the recently discovered inversion symmetric pnictide SrPtAs, 5 SOC has a pronounced effect on the superconducting properties.…”

“…5 The unit cell of SrPtAs contains two inequivalent AsPt layers that are related by inversion symmetry, see Fig. 1.…”

Superconductivity at 38 K in Iron-Based Compound with Platinum–Arsenide Layers Ca10(Pt4As8)(Fe2-xPtxAs2)5

“…Indeed, most platinum arsenides are metallic and even superconductivity has been observed in SrPt 2 As 2 18) and SrPtAs. 19) Further investigations will be invaluable to determine whether novel electronic states are realized in the present materials.…”