Abstrakt
We present transition metal-embedded (T@Gan) endohedral Ga clusters as a favorable structural motif for superconductivity and develop empirical, molecule-based, electron counting rules that govern the hierarchical architectures that the clusters assume in binary phases. Among the binary T@Gan endohedral cluster systems, Mo8Ga41, Mo6Ga31, Rh2Ga9, and Ir2 Ga9 are all previously known superconductors. The well-known exotic superconductor PuCoGa5 and related phases are also members of this endohedral gallide cluster family. We show that electron-deficient compounds like Mo8Ga41 prefer architectures with vertex-sharing gallium clusters, whereas electron-rich compounds, like PdGa5, prefer edge-sharing cluster architectures. The superconducting transition temperatures are highest for the electron-poor, corner-sharing architectures. Based on this analysis, the previously unknown endohedral cluster compound ReGa5 is postulated to exist at an intermediate electron count and a mix of corner sharing and edge sharing cluster architectures. The empirical prediction is shown to be correct and leads to the discovery of superconductivity in ReGa5. The Fermi levels for endohedral gallide cluster compounds are located in deep pseudogaps in the electronic densities of states, an important factor in determining their chemical stability, while at the same time limiting their superconducting transition temperatures.
Cytowania
-
4 6
CrossRef
-
0
Web of Science
-
4 9
Scopus
Autorzy (6)
Cytuj jako
Pełna treść
pełna treść publikacji nie jest dostępna w portalu
Słowa kluczowe
Informacje szczegółowe
- Kategoria:
- Publikacja w czasopiśmie
- Typ:
- artykuł w czasopiśmie wyróżnionym w JCR
- Opublikowano w:
-
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
nr 112,
strony E7048 - E7054,
ISSN: 0027-8424 - Język:
- angielski
- Rok wydania:
- 2015
- Opis bibliograficzny:
- Xie W., Luo H., Phelan B., Klimczuk T., Cevallos F., Cava R.: Endohedral gallide cluster superconductors and superconductivity in ReGa5// PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA. -Vol. 112, nr. 51 (2015), s.E7048-E7054
- DOI:
- Cyfrowy identyfikator dokumentu elektronicznego (otwiera się w nowej karcie) 10.1073/pnas.1522191112
- Weryfikacja:
- Politechnika Gdańska
wyświetlono 159 razy
Publikacje, które mogą cię zainteresować
Superconductivity in a new intermetallic structure type based on endohedral Ta@Ir7Ge4 clusters
- L. Srivichitranond,
- E. Seibel,
- W. Xie
- + 3 autorów
Superconductivity in the superhard boride WB4.2
- E. M. Carnicom,
- J. Strychalska-Nowak,
- P. Wiśniewski
- + 4 autorów
A Family of Pb-based Superconductors with Variable Cubic to Hexagonal Packing
- T. Kong,
- K. Górnicka,
- S. Gołąb
- + 3 autorów