Nearly ferromagnetic spin-triplet superconductivity

被引：375

作者：

Ran, Sheng ^{[1
,2
]}

Eckberg, Chris ^{[2
]}

Ding, Qing-Ping ^{[3
,4
]}

Furukawa, Yuji ^{[3
,4
]}

Metz, Tristin ^{[2
]}

Saha, Shanta R. ^{[1
,2
]}

Liu, I-Lin ^{[1
,2
,5
]}

Zic, Mark ^{[2
]}

Kim, Hyunsoo ^{[2
]}

Paglione, Johnpierre ^{[1
,2
]}

Butch, Nicholas P. ^{[1
,2
]}

机构：

[1] NIST, Ctr Neutron Res, Gaithersburg, MD 20899 USA

[2] Univ Maryland, Dept Phys, Ctr Nanophys & Adv Mat, College Pk, MD 20742 USA

[3] Iowa State Univ, US DOE, Ames Lab, Ames, IA 50011 USA

[4] Iowa State Univ, Dept Phys & Astron, Ames, IA 50011 USA

[5] Univ Maryland, Dept Mat Sci & Engn, College Pk, MD 20742 USA

来源：

SCIENCE | 2019年 / 365卷 / 6454期

基金：

美国国家科学基金会;

关键词：

CRITICAL-FIELD; FERMIONS; SR2RUO4; PHASES; PARITY;

D O I：

10.1126/science.aav8645

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Spin-triplet superconductors potentially host topological excitations that are of interest for quantum information processing. We report the discovery of spin-triplet superconductivity in UTe2, featuring a transition temperature of 1.6 kelvin and a very large and anisotropic upper critical field exceeding 40 teslas. This superconducting phase stability suggests that UTe2 is related to ferromagnetic superconductors such as UGe2, URhGe, and UCoGe. However, the lack of magnetic order and the observation of quantum critical scaling place UTe2 at the paramagnetic end of this ferromagnetic superconductor series. A large intrinsic zero-temperature reservoir of ungapped fermions indicates a highly unconventional type of superconducting pairing.

引用

页码：684 / +

页数：17

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