Domain structures in PbTiO3/SrTiO3 superlattices on DyScO3

Recently ferroelectric superlattices have emerged as the main platform for exploring novel polarization textures, such as polar vortices, skymion bubbles and supercrystal phases, and novel functionalities, such as negative capacitance [4,5]. Although state-of-the-art scanning transmission electron microscopy can provide useful information about the local polarization, much less is known about the response of these novel polar structures to temperature and applied electric field. To this end, we propose to use in-situ scanning x-ray diffraction microscopy (SXDM) at ID01 to study the evolution under applied field, at various temperatures, of the unusual domain structure appearing in in-plane polarised PbTiO3/SrTiO3 (PTO/STO) superlattices grown on DyScO3 substrates.