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TT: Fachverband Tiefe Temperaturen

TT 41: Unconventional Superconductors

TT 41.12: Vortrag

Mittwoch, 18. März 2020, 18:15–18:30, HSZ 201

Uranium-based superconducting materials — •Eteri Svanidze — Max Planck Institute for Chemical Physics of Solids

A rather large number of uranium-based materials are exotic - they show complex magnetic orders, coexistence of superconductivity with magnetism, enhanced effective electron masses, quantum critical behavior, and topological states [1-3]. All of these peculiar phenomena are thought to arise from electrons’ dual nature, which is also believed to lie at the origin of high-temperature superconductivity. From a condensed matter point of view, the most intriguing uranium-based materials are in fact superconductors - UBe13, URu2Si2, and UPt3. In this talk, I will provide a brief historic overview of superconductivity in uranium-based systems, and address several pertinent questions: Is superconductivity in uranium-based materials always unconventional? Why are superconducting temperatures in uranium-based compounds so low, compared to other compounds, based on actinide or lanthanide elements? Is there a way to pinpoint crystallographic motifs, which are favorable for the emergence of superconducting state? I will then provide a number of empirical features that should be targeted in the search for new uranium-based superconductors [4].

[1] J. C. Griveau and É. Colineau, Comptes Rendus Phys. 15, 599 (2014)

[2] B. D. White et al., Phys. C Supercond. its Appl. 514, 246 (2015)

[3] H. R. Ott and Z. Fisk, Encycl. Inorg. Bioinorg. Chem. (2018)

[4] E. Svanidze, Handbook Phys. Chem. Rare Earths 56, 163 (2019)