Two-Dimensional Confinement of 3d1 Electrons in LaTiO3/LaAlO3 Multilayers
SCIE
SCOPUS
- Title
- Two-Dimensional Confinement of 3d1 Electrons in LaTiO3/LaAlO3 Multilayers
- Authors
- Seo, SSA; Han, MJ; Hassink, GWJ; Choi, WS; Moon, SJ; Kim, JS; Susaki, T; Lee, YS; Yu, J; Bernhard, C; Hwang, HY; Rijnders, G; Blank, DHA; Keimer, B; Noh, TW
- Date Issued
- 2010-01-22
- Publisher
- American Physical Society
- Abstract
- We report spectroscopic ellipsometry measurements of the anisotropy of the interband transitions parallel and perpendicular to the planes of (LaTiO3)n(LaAlO3)5 multilayers with n = 1-3. These provide direct information about the electronic structure of the two-dimensional (2D) 3d(1) state of the Ti ions. In combination with local density approximation, including a Hubbard U calculation, we suggest that 2D confinement in the TiO2 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.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/12470
- DOI
- 10.1103/PhysRevLett.104.036401
- ISSN
- 0031-9007
- Article Type
- Article
- Citation
- PHYSICAL REVIEW LETTERS, vol. 104, no. 3, 2010-01-22
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