Unconventional Superconductivity in the Layered Iron Germanide YFe2Ge2

被引：43

作者：

Chen, Jiasheng ^{[1
]}

Semeniuk, Konstantin ^{[1
]}

Feng, Zhuo ^{[2
]}

Reiss, Pascal ^{[1
]}

Brown, Philip ^{[1
]}

Zou, Yang ^{[1
]}

Logg, Peter W. ^{[1
]}

Lampronti, Giulio I. ^{[3
]}

Grosche, F. Malte ^{[1
]}

机构：

[1] Univ Cambridge, Cavendish Lab, Cambridge CB3 0HE, England

[2] UCL, London Ctr Nanotechnol, London WC1H 0AH, England

[3] Univ Cambridge, Dept Earth Sci, Cambridge CB2 3EQ, England

来源：

PHYSICAL REVIEW LETTERS | 2016年 / 116卷 / 12期

基金：

英国工程与自然科学研究理事会;

关键词：

SOLID-STATE; TEMPERATURE; RESISTIVITY; BREAKDOWN; LUFE2GE2; SR2RUO4; HEAT;

D O I：

10.1103/PhysRevLett.116.127001

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The iron-based intermetallic YFe2Ge2 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 YFe2Ge2 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 YFe2Ge2 resembles that of KFe2As2 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.

引用

页数：5

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