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Coexistence of Ferromagnetic Fluctuations and Superconductivity in the Actinide Superconductor UTe2

Published

Author(s)

Shyam Sundar, S. Gheidi, K. Akintola, A. M. Cote, S. R. Dunsiger, S. Ran, Nicholas Butch, S. R. Saha, J. Paglione, J. E. Sonier

Abstract

We report low-temperature muon spin relaxation/rotation (υSR) measurements on single crystals of the actinide superconductor UTe2. Below 5 K we observe a continuous slowing down of magnetic fluctuations, which persists through the superconducting transition temperature (Tc = 1.6 K). The temperature dependence of the dynamic relaxation rate down to 0.4 K agrees with the self-consistent renormalization theory of spin fluctuations for a three-dimensional weak itinerant ferromagnetic metal. However, we find no evidence of long-range or local magnetic order down to 0.025 K. Weak transverse-field υSR measurements indicate that the superconductivity coexists with the magnetic fluctuations.
Citation
Physical Review B
Volume
100
Issue
14

Keywords

superconductor, muon spin relaxation

Citation

Sundar, S. , Gheidi, S. , Akintola, K. , Cote, A. , Dunsiger, S. , Ran, S. , Butch, N. , Saha, S. , Paglione, J. and Sonier, J. (2019), Coexistence of Ferromagnetic Fluctuations and Superconductivity in the Actinide Superconductor UTe<sub>2</sub>, Physical Review B, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=928181 (Accessed August 9, 2022)
Created October 22, 2019, Updated October 12, 2021