Thermal transport studies of the superconducting state of uranium ditelluride

The superconducting state of uranium ditelluride (UTe2) has become the focus of considerable experimental effort as a testbed for the physics of spin-triplet superconductivity. A key open question it the exact nature of the gap structure, including the type, number, and location of nodes. In this talk I will present data on the thermal conductivity of UTe2 in both the superconducting and normal state for a series of samples with different normal state scattering rates. Then I will discuss the possible locations of point nodes in light of these data, in particular in light of the zero-temperature behavior of the thermal transport for heat applied along each of the three crystal axes in a variety of magnetic field orientations. Finally, I will examine the possible implications of these data for the pairing interaction in UTe2.