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Abstract
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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Authors (6)
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Tai Kong
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Sylwia Gołąb
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Bartlomiej Wiendlocha
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Robert J. Cava
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Details
- Category:
- Articles
- Type:
- artykuł w czasopiśmie wyróżnionym w JCR
- Published in:
-
JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN
no. 87,
edition 7,
pages 1 - 9,
ISSN: 0031-9015 - Language:
- English
- Publication year:
- 2018
- Bibliographic description:
- Kong T., Górnicka K., Gołąb S., Wiendlocha B., Klimczuk T., Cava R. J.: 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
- DOI:
- Digital Object Identifier (open in new tab) 10.7566/jpsj.87.074711
- Verified by:
- Gdańsk University of Technology
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