Superconductivity in a new intermetallic structure type based on endohedral Ta@Ir7Ge4 clusters - Publikacja - MOST Wiedzy

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Superconductivity in a new intermetallic structure type based on endohedral Ta@Ir7Ge4 clusters

Abstrakt

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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Kategoria:
Publikacja w czasopiśmie
Typ:
artykuł w czasopiśmie wyróżnionym w JCR
Opublikowano w:
PHYSICAL REVIEW B nr 95, strony 1 - 7,
ISSN: 2469-9950
Język:
angielski
Rok wydania:
2017
Opis bibliograficzny:
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:
Cyfrowy identyfikator dokumentu elektronicznego (otwiera się w nowej karcie) 10.1103/physrevb.95.174521
Weryfikacja:
Politechnika Gdańska

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