Field-Enhanced Charge Order in TbSn₃

The rare-earth stannides Ln_xSn_2x+1 have complex magnetic phase diagrams that often feature noncollinear spin textures due to their layered structure with different magnetic anisotropies on different layers. Spin-polarized STM can be a powerful technique for both observing these spin textures at the atomic scale and studying how they interact with other phenomena such as charge density waves. Using both spin-polarized and spin-averaged STM, we observed multiple CDWs in TbSn₃, including one that breaks the lattice symmetry and is enhanced by magnetic field. I will discuss the responses of these CDWs to both in-plane and out-of-plane magnetic fields, as well as their possible origins.