Superconductivity in the Cu(Ir1-xPtx) 2Se4 spinel

Luo H, Klimczuk T, Muechler L, Schoop L, Hirai D, Fuccillo MK, Felser C, Cava RJ (2013)

Publication Type: Journal article

Publication year: 2013

Journal

Physical Review B - Condensed Matter and Materials Physics American Physical Society (APS)

Book Volume: 87

Article Number: 214510

Journal Issue: 21

DOI: 10.1103/PhysRevB.87.214510

Abstract

We report the observation of superconductivity in the CuIr 2Se4 spinel induced by partial substitution of Pt for Ir. The optimal doping level for superconductivity in Cu(Ir1-xPt x)2Se4 is x = 0.2, where Tc is 1.76 K. A superconducting Tc vs composition dome is established between the metallic, normal conductor CuIr2Se4 and semiconducting CuIrPtSe4. Electronic structure calculations show that the optimal Tc occurs near the electron count of a large peak in the calculated electronic density of states and that CuIrPtSe4 is a band-filled insulator. Characterization of the superconducting state in this heavy metal spinel through determination of ΔC/γTc indicates that it is BCS-like. The relatively high upper critical field at the optimal superconducting composition [Hc2(0) = 3.2 T] is much larger than that reported for analogous rhodium spinels and is comparable to or exceeds the Pauli field (μ0HP), suggesting that strong spin-orbit coupling may influence the superconducting state. Further, comparison to doped CuIr2S4 suggests that superconductivity in iridium spinels is not necessarily associated with the destabilization of a charge-ordered spin-paired state through doping. © 2013 American Physical Society.

Involved external institutions

Princeton University US United States (USA) (US) Gdańsk University of Technology (GUT) / Politechnika Gdańska PL Poland (PL) Max-Planck-Institut für Chemische Physik fester Stoffe (MPI CPfS) / Max Planck Institute for Chemical Physics of Solids DE Germany (DE)

How to cite

APA:

Luo, H., Klimczuk, T., Muechler, L., Schoop, L., Hirai, D., Fuccillo, M.K.,... Cava, R.J. (2013). Superconductivity in the Cu(Ir1-xPtx) 2Se4 spinel. Physical Review B - Condensed Matter and Materials Physics, 87(21). https://doi.org/10.1103/PhysRevB.87.214510

MLA:

Luo, Huixia, et al. "Superconductivity in the Cu(Ir1-xPtx) 2Se4 spinel." Physical Review B - Condensed Matter and Materials Physics 87.21 (2013).

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