Chiral structures of electric polarization vectors quantified by X-ray resonant scattering

0556820 - FZÚ 2023 RIV GB eng J - Journal Article
Kim, K.T. - McCarter, M.R. - Stoica, V.A. - Das, S. - Klewe, C. - Donoway, E.P. - Burn, D.M. - Shafer, P. - Rodolakis, F. - Pereira Gonçalves, Mauro Antonió - Gomez-Ortiz, F. - Iniguez, J. - Garcia-Fernandez, P. - Junquera, J. - Susarla, S. - Lovesey, S.W. - van der Laan, G. - Park, S.Y. - Martin, L.W. - Freeland, J.W. - Ramesh, R. - Lee, D.R.
Chiral structures of electric polarization vectors quantified by X-ray resonant scattering.
Nature Communications. Roč. 13, č. 1 (2022), č. článku 1769. E-ISSN 2041-1723
R&D Projects: GA ČR GX19-28594X
Institutional support: RVO:68378271
Keywords : resonant elastic x-ray scattering (REXS) * ferroelectric oxide superlattice * polar chiral structures * x-ray resonant magnetic scattering (XRMS)
OECD category: Condensed matter physics (including formerly solid state physics, supercond.)
Impact factor: 16.6, year: 2022
Method of publishing: Open access

Resonant elastic X-ray scattering (REXS) offers a unique tool to investigate solid-state systems providing spatial knowledge from diffraction combined with electronic information through the enhanced absorption process, allowing the probing of magnetic, charge, spin, and orbital degrees of spatial order together with electronic structure. A new promising application of REXS is to elucidate the chiral structure of electrical polarization emergent in a ferroelectric oxide superlattice in which the polarization vectors in the REXS amplitude are implicitly described through an anisotropic tensor corresponding to the quadrupole moment. Here, we present a detailed theoretical framework and analysis to quantitatively analyze the experimental results of Ti L-edge REXS of a polar vortex array formed in a PbTiO3/SrTiO3 superlattice. Based on this theoretical framework, REXS for polar chiral structures can become a useful tool similar to x-ray resonant magnetic scattering (XRMS), enabling a comprehensive study of both electric and magnetic REXS on the chiral structures.
Permanent Link: http://hdl.handle.net/11104/0331199