Non-centrosymmetric superconductor Th $$_4$$ 4 Be $$_{{33}}$$ 33 Pt $$_{{16}}$$ 16 and heavy-fermion U $$_4$$ 4 Be $$_{{33}}$$ 33 Pt $$_{{16}}$$ 16 cage compounds
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 n...
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2021
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oai:doaj.org-article:36d18920a2834848876a5c323eb0bc022021-11-21T12:17:47ZNon-centrosymmetric superconductor Th $$_4$$ 4 Be $$_{{33}}$$ 33 Pt $$_{{16}}$$ 16 and heavy-fermion U $$_4$$ 4 Be $$_{{33}}$$ 33 Pt $$_{{16}}$$ 16 cage compounds10.1038/s41598-021-01461-62045-2322https://doaj.org/article/36d18920a2834848876a5c323eb0bc022021-11-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-01461-6https://doaj.org/toc/2045-2322Abstract 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 $${\text {Th}}_4{\text {Be}}_{{33}}{\text {Pt}}_{{16}}$$ Th 4 Be 33 Pt 16 ( $$I{\bar{4}}3d$$ I 4 ¯ 3 d space group). This intermetallic cage compound displays superconductivity below $$T_{\text {c}} = 0.90 \pm 0.04$$ T c = 0.90 ± 0.04 K, as evidenced by specific heat and resistivity data. $${\text {Th}}_4{\text {Be}}_{{33}}{\text {Pt}}_{{16}}$$ Th 4 Be 33 Pt 16 is a type-II superconductor, which has an upper critical field $${\text {H}}_{{\text {c}}2} = 0.27$$ H c 2 = 0.27 T and a moderate Sommerfeld coefficient $$\gamma _{\text {n}} = 16.3 \pm 0.8$$ γ n = 16.3 ± 0.8 mJ $${\text {mol}}^{-1}_{\text {Th}}$$ mol Th - 1 $${\text {K}}^{-2}$$ 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 $${\text {U}}_4{\text {Be}}_{{33}}{\text {Pt}}_{{16}}$$ U 4 Be 33 Pt 16 compound is a paramagnet with a moderately enhanced electronic mass, as indicated by the electronic specific heat coefficient $$\gamma _{\text {n}} = 200$$ γ n = 200 mJ $${\text {mol}}^{-1}_{\text {U}}$$ mol U - 1 $${\text {K}}^{-2}$$ K - 2 and Kadowaki–Woods ratio $$A/\gamma ^2 = 1.1 \times 10^{-5}$$ A / γ 2 = 1.1 × 10 - 5 $$\upmu $$ μ $$\Omega $$ Ω cm $${\text {K}}^2$$ K 2 $${\text {mol}}_{\text {U}}^2$$ mol U 2 (mJ) $$^{-2}$$ - 2 . Both $${\text {Th}}_4{\text {Be}}_{{33}}{\text {Pt}}_{{16}}$$ Th 4 Be 33 Pt 16 and $${\text {U}}_4{\text {Be}}_{{33}}{\text {Pt}}_{{16}}$$ U 4 Be 33 Pt 16 are crystallographically complex, each hosting 212 atoms per unit cell.P. KoželjM. JuckelA. AmonYu. ProtsA. OrmeciU. BurkhardtM. BrandoA. Leithe-JasperYu. GrinE. SvanidzeNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-9 (2021) |
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Medicine R Science Q P. Koželj M. Juckel A. Amon Yu. Prots A. Ormeci U. Burkhardt M. Brando A. Leithe-Jasper Yu. Grin E. Svanidze Non-centrosymmetric superconductor Th $$_4$$ 4 Be $$_{{33}}$$ 33 Pt $$_{{16}}$$ 16 and heavy-fermion U $$_4$$ 4 Be $$_{{33}}$$ 33 Pt $$_{{16}}$$ 16 cage compounds |
| description |
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 $${\text {Th}}_4{\text {Be}}_{{33}}{\text {Pt}}_{{16}}$$ Th 4 Be 33 Pt 16 ( $$I{\bar{4}}3d$$ I 4 ¯ 3 d space group). This intermetallic cage compound displays superconductivity below $$T_{\text {c}} = 0.90 \pm 0.04$$ T c = 0.90 ± 0.04 K, as evidenced by specific heat and resistivity data. $${\text {Th}}_4{\text {Be}}_{{33}}{\text {Pt}}_{{16}}$$ Th 4 Be 33 Pt 16 is a type-II superconductor, which has an upper critical field $${\text {H}}_{{\text {c}}2} = 0.27$$ H c 2 = 0.27 T and a moderate Sommerfeld coefficient $$\gamma _{\text {n}} = 16.3 \pm 0.8$$ γ n = 16.3 ± 0.8 mJ $${\text {mol}}^{-1}_{\text {Th}}$$ mol Th - 1 $${\text {K}}^{-2}$$ 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 $${\text {U}}_4{\text {Be}}_{{33}}{\text {Pt}}_{{16}}$$ U 4 Be 33 Pt 16 compound is a paramagnet with a moderately enhanced electronic mass, as indicated by the electronic specific heat coefficient $$\gamma _{\text {n}} = 200$$ γ n = 200 mJ $${\text {mol}}^{-1}_{\text {U}}$$ mol U - 1 $${\text {K}}^{-2}$$ K - 2 and Kadowaki–Woods ratio $$A/\gamma ^2 = 1.1 \times 10^{-5}$$ A / γ 2 = 1.1 × 10 - 5 $$\upmu $$ μ $$\Omega $$ Ω cm $${\text {K}}^2$$ K 2 $${\text {mol}}_{\text {U}}^2$$ mol U 2 (mJ) $$^{-2}$$ - 2 . Both $${\text {Th}}_4{\text {Be}}_{{33}}{\text {Pt}}_{{16}}$$ Th 4 Be 33 Pt 16 and $${\text {U}}_4{\text {Be}}_{{33}}{\text {Pt}}_{{16}}$$ U 4 Be 33 Pt 16 are crystallographically complex, each hosting 212 atoms per unit cell. |
| format |
article |
| author |
P. Koželj M. Juckel A. Amon Yu. Prots A. Ormeci U. Burkhardt M. Brando A. Leithe-Jasper Yu. Grin E. Svanidze |
| author_facet |
P. Koželj M. Juckel A. Amon Yu. Prots A. Ormeci U. Burkhardt M. Brando A. Leithe-Jasper Yu. Grin E. Svanidze |
| author_sort |
P. Koželj |
| title |
Non-centrosymmetric superconductor Th $$_4$$ 4 Be $$_{{33}}$$ 33 Pt $$_{{16}}$$ 16 and heavy-fermion U $$_4$$ 4 Be $$_{{33}}$$ 33 Pt $$_{{16}}$$ 16 cage compounds |
| title_short |
Non-centrosymmetric superconductor Th $$_4$$ 4 Be $$_{{33}}$$ 33 Pt $$_{{16}}$$ 16 and heavy-fermion U $$_4$$ 4 Be $$_{{33}}$$ 33 Pt $$_{{16}}$$ 16 cage compounds |
| title_full |
Non-centrosymmetric superconductor Th $$_4$$ 4 Be $$_{{33}}$$ 33 Pt $$_{{16}}$$ 16 and heavy-fermion U $$_4$$ 4 Be $$_{{33}}$$ 33 Pt $$_{{16}}$$ 16 cage compounds |
| title_fullStr |
Non-centrosymmetric superconductor Th $$_4$$ 4 Be $$_{{33}}$$ 33 Pt $$_{{16}}$$ 16 and heavy-fermion U $$_4$$ 4 Be $$_{{33}}$$ 33 Pt $$_{{16}}$$ 16 cage compounds |
| title_full_unstemmed |
Non-centrosymmetric superconductor Th $$_4$$ 4 Be $$_{{33}}$$ 33 Pt $$_{{16}}$$ 16 and heavy-fermion U $$_4$$ 4 Be $$_{{33}}$$ 33 Pt $$_{{16}}$$ 16 cage compounds |
| title_sort |
non-centrosymmetric superconductor th $$_4$$ 4 be $$_{{33}}$$ 33 pt $$_{{16}}$$ 16 and heavy-fermion u $$_4$$ 4 be $$_{{33}}$$ 33 pt $$_{{16}}$$ 16 cage compounds |
| publisher |
Nature Portfolio |
| publishDate |
2021 |
| url |
https://doaj.org/article/36d18920a2834848876a5c323eb0bc02 |
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