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Abstract
We report superconductivity in the full Heusler compound LiPd2Si (space group Fm3̅m, No. 225) at a critical temperature of Tc = 1.3 K and a normalized heat capacity jump at Tc, ΔC/γTc = 1.1. The low-temperature isothermal magnetization curves imply type-I superconductivity, as previously observed in LiPd2Ge. We show, based on density functional theory calculations and using the molecular orbital theory approach, that while LiPd2Si and LiPd2Ge share the Pd cubic cage motif that is found in most of the reported Heusler superconductors, they show distinctive features in the electronic structure. This is due to the fact that Li occupies the site which, in other compounds, is filled with an early transition metal or a rare-earth metal. Thus, while a simple valence electron count–property relationship is useful in predicting and tuning Heusler materials, inclusion of the symmetry of interacting frontier orbitals is also necessary for the best understanding.
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Authors (7)
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Xin Gui
- Department of Chemistry, Princeton University, Princeton
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Juan Chamorro
- Department of Chemistry, William H. Miller III Department of Physics and Astronomy, Department of Materials Science and Engineering, and Institute for Quantum Matter, Johns Hopkins University
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Tyrel McQueen
- Department of Chemistry, William H. Miller III Department of Physics and Astronomy, Department of Materials Science and Engineering, and Institute for Quantum Matter, Johns Hopkins University
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Robert J. Cava
- Department of Chemistry, Princeton University, Princeton
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Full text
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- Accepted or Published Version
- DOI:
- Digital Object Identifier (open in new tab) 10.1021/acs.chemmater.3c02398
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- Category:
- Articles
- Type:
- artykuły w czasopismach
- Published in:
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CHEMISTRY OF MATERIALS
no. 36,
pages 1870 - 1879,
ISSN: 0897-4756 - Language:
- English
- Publication year:
- 2024
- Bibliographic description:
- Górnicka K., Gui X., Chamorro J., Mcqueen T., Cava R. J., Klimczuk T., Winiarski M.: Superconductivity–Electron Count Relationship in Heusler Phases─the Case of LiPd2Si// CHEMISTRY OF MATERIALS -Vol. 36,iss. 4 (2024), s.1870-1879
- DOI:
- Digital Object Identifier (open in new tab) 10.1021/acs.chemmater.3c02398
- Sources of funding:
-
- Free publication
- Verified by:
- Gdańsk University of Technology
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