Non-centrosymmetric superconductor Th4Be33Pt16 and heavy-fermion U4Be33Pt16 
cage compounds

Koželj, P.; Juckel, M.; Amon, A.; Prots, Yu.; Ormeci, A.; Burkhardt, U.; Brando, M.; Leithe-Jasper, A.; Grin, Yu.; Svanidze, E.

doi:10.1038/s41598-021-01461-6

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Non-centrosymmetric superconductor Th₄Be₃₃Pt₁₆ and heavy-fermion U₄Be₃₃Pt₁₆ cage compounds

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Koželj, P.
Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

/persons/resource/persons248163

Juckel, M.
Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

/persons/resource/persons214276

Amon, A.
Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

/persons/resource/persons126806

Prots, Yu.
Yuri Prots, Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

/persons/resource/persons126787

Ormeci, A.
Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

/persons/resource/persons126556

Burkhardt, U.
Ulrich Burkhardt, Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

/persons/resource/persons126548

Brando, M.
Manuel Brando, Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

/persons/resource/persons126726

Leithe-Jasper, A.
Andreas Leithe-Jasper, Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

/persons/resource/persons126626

Grin, Yu.
Juri Grin, Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

/persons/resource/persons206323

Svanidze, E.
Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Citation

Koželj, P., Juckel, M., Amon, A., Prots, Y., Ormeci, A., Burkhardt, U., et al. (2021). Non-centrosymmetric superconductor Th₄Be₃₃Pt₁₆ and heavy-fermion U₄Be₃₃Pt₁₆ cage compounds. Scientific Reports, 11: 22352, pp. 1-9. doi:10.1038/s41598-021-01461-6.

Cite as: https://hdl.handle.net/21.11116/0000-0009-9E8C-8

Abstract

Unconventional superconductivity in non-centrosymmetric superconductors has attracted a considerable amount of attention. While several lanthanide-based materials have been reported previously, the number of actinide-based systems remains small. In this work, we present the discovery of a novel cubic complex non-centrosymmetric superconductor Th4Be33Pt16 (I (4) over bar 3d space group). This intermetallic cage compound displays superconductivity below T-c = 0.90 +/- 0.04 K, as evidenced by specific heat and resistivity data. Th4Be33Pt16 is a type-II superconductor, which has an upper critical field H-c2 = 0.27 T and a moderate Sommerfeld coefficient gamma(n) = 16.3 +/- 0.8 mJ mol(Th)(-1) K-2. A non-zero density of states at the Fermi level is evident from metallic behavior in the normal state, as well as from electronic band structure calculations. The isostructural U4Be33Pt16 compound is a paramagnet with a moderately enhanced electronic mass, as indicated by the electronic specific heat coefficient gamma(n) = 200 mJ mol(U)(-1)K(-2) and Kadowaki-Woods ratio A/gamma(2) = 1.1 x 10(-5) mu Omega cm K-2 mol(U)(2)(mJ)(-2). Both Th4Be33Pt16 and U4Be33Pt16 are crystallographically complex, each hosting 212 atoms per unit cell.