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Unconventional Superconductivity in the Layered Iron Germanide YFe(2)Ge(2).


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Authors

Semeniuk, Konstantin  ORCID logo  https://orcid.org/0000-0003-2680-128X
Feng, Zhuo 
Reiss, Pascal 
Brown, Philip 

Abstract

The iron-based intermetallic YFe_{2}Ge_{2} stands out among transition metal compounds for its high Sommerfeld coefficient of the order of 100  mJ/(mol K^{2}), which signals strong electronic correlations. A new generation of high quality samples of YFe_{2}Ge_{2} show superconducting transition anomalies below 1.8 K in thermodynamic, magnetic, and transport measurements, establishing that superconductivity is intrinsic in this layered iron compound outside the known superconducting iron pnictide or chalcogenide families. The Fermi surface geometry of YFe_{2}Ge_{2} resembles that of KFe_{2}As_{2} in the high pressure collapsed tetragonal phase, in which superconductivity at temperatures as high as 10 K has recently been reported, suggesting an underlying connection between the two systems.

Description

Keywords

cond-mat.str-el, cond-mat.str-el, cond-mat.supr-con

Journal Title

Phys Rev Lett

Conference Name

Journal ISSN

0031-9007
1079-7114

Volume Title

116

Publisher

American Physical Society (APS)
Sponsorship
Engineering and Physical Sciences Research Council (EP/K012894/1)
The work was supported by the EPSRC of the UK and by Trinity College. Supporting data can be found at https://www.repository.cam.ac.uk/handle/1810/253875.