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A Family of Pb-based Superconductors with Variable Cubic to Hexagonal Packing

Abstrakt

We describe three previously unreported superconductors, BaPb3, Ba0.89Sr0.11Pb3, and Ba0.5Sr0.5Pb3. These three materials, together with SrPb3, form a distinctive isoelectronic family of intermetallic superconductors based on the stacking of Pb planes, with crystal structures that display a hexagonal to cubic perovskite-like progression, as rarely seen in metals. The superconducting transition temperatures (Tc) are similar for all −2.2 K for BaPb3, 2.7 K for Ba0.89Sr0.11- Pb3, and 2.6 K for Ba0.5Sr0.5Pb3, and the previously reported Tc of SrPb3, ∼2 K, is confirmed. The materials are moderate coupling superconductors, and calculations show that the electronic densities of states at the Fermi energy are primarily contributed by Pb. The observations suggest that the Pb-stacking variation has only a minor effect on the superconductivity.

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Tai Kong, Karolina Górnicka, Sylwia Gołąb, Bartlomiej Wiendlocha, Tomasz Klimczuk, Robert J. Cava. (2018). A Family of Pb-based Superconductors with Variable Cubic to Hexagonal Packing, 87(7), 1-9. https://doi.org/10.7566/jpsj.87.074711

Informacje szczegółowe

Kategoria:
Publikacja w czasopiśmie
Typ:
artykuł w czasopiśmie wyróżnionym w JCR
Opublikowano w:
JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN nr 87, wydanie 7, strony 1 - 9,
ISSN: 0031-9015
Język:
angielski
Rok wydania:
2018
Opis bibliograficzny:
Kong T., Górnicka K., Gołąb S., Wiendlocha B., Klimczuk T., Cava R.: A Family of Pb-based Superconductors with Variable Cubic to Hexagonal Packing// JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN. -Vol. 87, iss. 7 (2018), s.1-9

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