Nonlinear electric transport in high-field superconductor UTe2

UTe2 displays a tantalizing phase diagram under high magnetic fields, featuring multipleunconventional superconducting and magnetic phases with distinct order parameters. In thisMPSD exchange seminar, I will present our recent experimental results on probing nonlinearelectronic transport in these non-trivial states.First, I will discuss the field-reinforced superconducting state and its strongly anisotropic vortexresponse with respect to both current and magnetic-field orientation. These results reveal anunexpected quasi-2D superconducting state in a non-layered material. Next, I will provideevidence for a first-order transition modulated by high current densities in the high-field region,emphasizing its direct connection to a hidden order within the field-polarized phase.