Field-dependent superconducting gap in UTe₂

UTe₂ has emerged as a promising candidate for realizing spin-triplet superconductivity, characterized by critical ferromagnetic fluctuations and an extremely large, anisotropic upper critical field. Unexpectedly, for UTe₂ with a superconducting transition temperature of 1.6K, unusual in-gap excitations are revealed in the tunneling conductance, alongside a significant residual density of states in specific heat measurements. Recent scanning tunneling microscopy (STM) measurements have also suggested the presence of a tripet pair density wave that coexists with a charge density wave on the surface of the material. Here, we investigate field-dependent superconducting (SC) gap and charge density wave of UTe₂ by STM. Utilizing a vector magnetic field, we visualize the distinct response of SC gap when fields are applied along different axes. Our results provide insights into the pairing mechanism in UTe2 from a microscopic perspective.