Two-Dimensional Confinement of 3d(1) Electrons in LaTiO3/LaAlO3 Multilayers

Seo, S. S. A.; Han, M. J.; Hassink, G. W. J.; Choi, W. S.; Moon, S. J.; Kim, J. S.; Susaki, T.; Lee, Y. S.; Yu, J.; Bernhard, C.; Hwang, H. Y.; Rijnders, G.; Blank, D. H. A.; Keimer, B.; Noh, T. W.

doi:10.1103/PhysRevLett.104.036401

상세 보기

Two-Dimensional Confinement of 3d(1) Electrons in LaTiO3/LaAlO3 Multilayers

Seo, S. S. A.;
Han, M. J.;
Hassink, G. W. J.;
Choi, W. S.;
Moon, S. J.;
... Lee, Y. S.;
외 9명

Citations

WEB OF SCIENCE

33

Citations

SCOPUS

44

초록

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.

키워드

MOTT INSULATOR; ORBITAL LIQUID; SUPERLATTICES; METAL; HETEROSTRUCTURES; RECONSTRUCTION; INTERFACE; LATIO3; CU

제목: Two-Dimensional Confinement of 3d(1) Electrons in LaTiO3/LaAlO3 Multilayers

저자: Seo, S. S. A.; Han, M. J.; Hassink, G. W. J.; Choi, W. S.; Moon, S. J.; Kim, J. S.; Susaki, T.; Lee, Y. S.; Yu, J.; Bernhard, C.; Hwang, H. Y.; Rijnders, G.; Blank, D. H. A.; Keimer, B.; Noh, T. W.

DOI: 10.1103/PhysRevLett.104.036401

발행일: 2010-01-22

유형: Article

저널명: Physical Review Letters

권: 104

호: 3

출판사: AMER PHYSICAL SOC

발행국가: 미국

ISSN: E 1079-7114
P 0031-9007