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Symmetry of Magnetic Correlations in Spin-Triplet Superconductor UTe2

Published

Author(s)

Nicholas Butch, Sheng Ran, Shanta Saha, Paul Neves, Mark P. Zic, Johnpierre N. Paglione, Yegor N. Vekhov, Sergiy Gladchenko, Jose Rodriguez Rivera

Abstract

The temperature dependence of the low-energy magnetic excitations in the spin-triplet superconductor UTe2 was measured via inelastic neutron scattering in the normal and superconducting states. These excitations have a peak instensity at 4 meV, follow the Brillouin zone edges near the crystallographic b-axis, obey the paramagnetic structural symmetry, and track the temperature evolution of the heavy fermion bulk magnetic susceptibility. Thus, the imaginary part of the dynamic susceptibility follows the behavior of interband correlations in a hybridized Kondo lattice with an appropriate characteristic energy. These excitations are a lower-dimensional analog of phenomena observed in other Kondo lattice materials, such that their presence is not necessarily due to dominance of ferromagnetic or antiferromagnetic correlations. The onset of superconductivity alters the magnetic excitations noticeably on the same energy scales, suggesting that these changes originate from additional electronic structure modification.
Citation
npj Quantum Materials
Volume
7
Issue
1

Keywords

heavy fermion, spin triplet superconductor

Citation

Butch, N. , Ran, S. , Saha, S. , Neves, P. , Zic, M. , Paglione, J. , Vekhov, Y. , Gladchenko, S. and Rodriguez Rivera, J. (2022), Symmetry of Magnetic Correlations in Spin-Triplet Superconductor UTe2, npj Quantum Materials, [online], https://doi.org/10.1038/s41535-022-00445-7, https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=933789 (Accessed April 17, 2024)
Created April 5, 2022, Updated March 18, 2024