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Abstract
We report the observation of superconductivity at a temperature near 3.5 K for the previously unreported compound TaIr2Ge2. In addition to being a superconductor, this material displays a new crystal structure type that contains endohedral clusters, as determined by single-crystal x-ray diffraction structure refinement; the structure is more complex than those of the commonly observed tetragonal 122 intermetallic phases. Despite the strong metal-metal interactions, electronic structure calculations show the presence of a relatively simple set of states at the Fermi level, consisting mostly of Ta atom orbital contributions. The superconducting transition is characterized by temperature-dependent resistivity, magnetic susceptibility and specific heat measurements, and is of the weak coupling BCS type with C/γTc = 1.55. The upper critical field at 0 K is estimated to be 2 T. Basic characterization of the superconductivity suggests that this material is similar to PbTaSe2, for which the effects of spin-orbit coupling may be important.
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Authors (6)
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Laura Srivichitranond
- Princeton University
-
Elizabeth Seibel
- Princeton University
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Weiwei Xie
- Louisiana State University
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R. J. Cava
- Princeton University
Cite as
Full text
- Publication version
- Accepted or Published Version
- DOI:
- Digital Object Identifier (open in new tab) 10.1103/PhysRevB.95.174521
- License
- Copyright (2017 American Physical Society)
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Details
- Category:
- Articles
- Type:
- artykuł w czasopiśmie wyróżnionym w JCR
- Published in:
-
PHYSICAL REVIEW B
no. 95,
pages 1 - 7,
ISSN: 2469-9950 - Language:
- English
- Publication year:
- 2017
- Bibliographic description:
- Srivichitranond L., Seibel E., Xie W., Sobczak Z., Klimczuk T., Cava R.: Superconductivity in a new intermetallic structure type based on endohedral Ta@Ir7Ge4 clusters// PHYSICAL REVIEW B. -Vol. 95, (2017), s.1-7
- DOI:
- Digital Object Identifier (open in new tab) 10.1103/physrevb.95.174521
- Verified by:
- Gdańsk University of Technology
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