Abstract
We report spectroscopic ellipsometry measurements of the anisotropy of the interband transitions parallel and perpendicular to the planes of $({\mathrm{LaTiO}}_{3})n({\mathrm{LaAlO}}_{3})5$ multilayers with $n=1--3$. These provide direct information about the electronic structure of the two-dimensional (2D) $3{d}^{1}$ state of the Ti ions. In combination with local density approximation, including a Hubbard $U$ calculation, we suggest that 2D confinement in the ${\mathrm{TiO}}_{2}$ slabs lifts the degeneracy of the ${t}_{2g}$ states leaving only the planar ${d}_{xy}$ orbitals occupied. We outline that these multilayers can serve as a model system for the study of the ${t}_{2g}$ 2D Hubbard model.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
