Enhancement and Reentrance of Spin Triplet Superconductivity in UTe₂ under Pressure

Author

Sheng Ran
Hyunsoo Kim, Missouri University of Science and TechnologyFollow
I. Lin Liu
Shanta R. Saha
Ian Hayes
Tristin Metz
Yun Suk Eo
Johnpierre Paglione
Nicholas P. Butch

Abstract

Spin triplet superconductivity in the Kondo lattice UTe₂ appears to be associated with spin fluctuations originating from incipient ferromagnetic order. Here we show clear evidence of twofold enhancement of superconductivity under pressure, which discontinuously transitions to magnetic order, likely of ferromagnetic nature, at higher pressures. The application of a magnetic field tunes the system back across a first-order phase boundary. Straddling this phase boundary, we find another example of reentrant superconductivity in UTe₂. As the superconductivity and magnetism exist on two opposite sides of the first-order phase boundary, our results indicate other microscopic mechanisms may be playing a role in stabilizing spin triplet superconductivity in addition to spin fluctuations associated with magnetism.

Recommended Citation

S. Ran et al., "Enhancement and Reentrance of Spin Triplet Superconductivity in UTe₂ under Pressure," Physical Review B, vol. 101, no. 14, article no. 140503, American Physical Society (APS), Apr 2020.

The definitive version is available at https://doi.org/10.1103/PhysRevB.101.140503

Department(s)

Physics

Comments

National Science Foundation, Grant DMR-1610349

International Standard Serial Number (ISSN)

2469-9969; 2469-9950

Document Type

Article - Journal

Document Version

Final Version

File Type

text

Language(s)

English

Rights

© 2020 American Physical Society (APS), All rights reserved.

Publication Date

01 Apr 2020