Coexistence of ferromagnetic fluctuations and superconductivity in the actinide superconductor UTe2

Shyam Sundar; S. Gheidi; K. Akintola; A. M. Côté; S. R. Dunsiger; S. Ran; N. P. Butch; S. R. Saha; J. Paglione; J. E. Sonier

doi:10.1103/PhysRevB.100.140502

Coexistence of ferromagnetic fluctuations and superconductivity in the actinide superconductor UTe2

Shyam Sundar, S. Gheidi, K. Akintola, A. M. Côté, S. R. Dunsiger, S. Ran, N. P. Butch, S. R. Saha, J. Paglione, J. E. Sonier

Department of Physics

Research output: Contribution to journal › Article › peer-review

103 Scopus citations

Abstract

We report low-temperature muon spin relaxation/rotation (μSR) measurements on single crystals of the actinide superconductor UTe2. Below 5 K we observe a continuous slowing down of magnetic fluctuations that persists through the superconducting transition temperature (Tc=1.6 K), but we find no evidence of long-range or local magnetic order down to 0.025 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. Our μSR measurements also indicate that the superconductivity coexists with the magnetic fluctuations.

Original language	English
Article number	140502
Journal	Physical Review B
Volume	100
Issue number	14
DOIs	https://doi.org/10.1103/PhysRevB.100.140502
State	Published - Oct 23 2019

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abstract = "We report low-temperature muon spin relaxation/rotation (μSR) measurements on single crystals of the actinide superconductor UTe2. Below 5 K we observe a continuous slowing down of magnetic fluctuations that persists through the superconducting transition temperature (Tc=1.6 K), but we find no evidence of long-range or local magnetic order down to 0.025 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. Our μSR measurements also indicate that the superconductivity coexists with the magnetic fluctuations.",

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AU - Sundar, Shyam

AU - Gheidi, S.

AU - Akintola, K.

AU - Côté, A. M.

AU - Dunsiger, S. R.

AU - Ran, S.

AU - Butch, N. P.

AU - Saha, S. R.

AU - Paglione, J.

AU - Sonier, J. E.

PY - 2019/10/23

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N2 - We report low-temperature muon spin relaxation/rotation (μSR) measurements on single crystals of the actinide superconductor UTe2. Below 5 K we observe a continuous slowing down of magnetic fluctuations that persists through the superconducting transition temperature (Tc=1.6 K), but we find no evidence of long-range or local magnetic order down to 0.025 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. Our μSR measurements also indicate that the superconductivity coexists with the magnetic fluctuations.

AB - We report low-temperature muon spin relaxation/rotation (μSR) measurements on single crystals of the actinide superconductor UTe2. Below 5 K we observe a continuous slowing down of magnetic fluctuations that persists through the superconducting transition temperature (Tc=1.6 K), but we find no evidence of long-range or local magnetic order down to 0.025 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. Our μSR measurements also indicate that the superconductivity coexists with the magnetic fluctuations.

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Coexistence of ferromagnetic fluctuations and superconductivity in the actinide superconductor UTe2

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