Preprint
Aug 2026
Theory of Magnetic Excitations in the Heavy-Fermion Spin-Triplet Superconductor UTe$_2$
We study the dynamical spin response of UTe$_2$ by using a mixed-dimensional periodic Anderson model. Within the BCS-RPA formalism, we examine how the $f$-orbital character of the quasiparticles affects magnetic excitations in both the normal and superconducting (SC) states. In the normal state, finite mixing between l...
Koki Shimura, Shuntaro Sumita, Y. Kato
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