Theory of Magnetic Excitations in the Heavy-Fermion Spin-Triplet Superconductor UTe${}_2$

Koki Shimura, Shuntaro Sumita, Yusuke Kato

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…