Publications by authors named "Mauro A P Goncalves"
Typical magnetic skyrmion is a string of inverted magnetization within a ferromagnet, protected by a sleeve of a vortexlike spin texture, such that its cross-section carries an integer topological charge. Some magnets form antiskyrmions, the antiparticle strings which carry an opposite topological charge. Here we demonstrate that topologically equivalent but purely electric antiskyrmion can exist in a ferroelectric material as well.
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- The study addresses the challenges in characterizing small nanostructures, specifically ferroelectric and ferromagnetic skyrmions, due to their complex three-dimensional structures.
- Resonant elastic x-ray scattering (REXS) has been identified as a promising technique for investigating these nanostructures, particularly for studying the chirality of spin textures.
- The research introduces a modeling framework for applying REXS to charge quadrupole moments in ferroelectrics, demonstrating its effectiveness in analyzing the coexistence and structure of polar skyrmions with mixed chirality.
Article Synopsis
- Resonant elastic X-ray scattering (REXS) is a powerful technique that combines the spatial resolution of diffraction with electronic information, enabling detailed studies of solid-state systems and their magnetic, charge, spin, and orbital properties.
- A new application of REXS focuses on understanding the chiral structure of electric polarization in ferroelectric oxide superlattices, specifically analyzing the polarization vectors through an anisotropic tensor related to the quadrupole moment.
- The authors present a thorough theoretical framework to interpret experimental results from Ti L-edge REXS of a polar vortex array in a PbTiO/SrTiO superlattice, suggesting that REXS can be a valuable tool for exploring both electric and magnetic properties of ch