Triplet Pair Density Waves in UTe2

It was recently discovered that charge density wave (CDW) order also occurs in the superconducting phase of uranium ditelluride (UTe2). Unexpectedly, in the presence of an external magnetic field, the CDWs are suppressed and disappear above the superconducting upper critical field of UTe2. In this talk, we show that the behavior of the CDWs is explained by the existence of spin-triplet pair-density waves (PDWs) that coexist with the uniform spin-triplet superconductivity of UTe2. The combination of PDWs and uniform superconductivity gives rise to daughter CDWs, and the daughter CDWs inherit the magnetic field sensitivities of the parent PDW and superconducting orders. These results indicate that UTe2 potentially hosts the first known example of a triplet PDW state.