Spectral evolution in (Ca,Sr)RuO_3 near the Mott-Hubbard transition
J. S. Ahn, J. Bak, H. S. Choi, T. W. Noh (Seoul Nat'l U., Korea), J., E. Han (Max-Planck Inst., Germany), Yunkyu Bang (Chonnam Nat'l U., Korea), J., H. Cho (Pusan Nat'l U., Korea), and Q. X. Xia (LANL, USA)
TL;DR
This study explores the optical properties of (Ca,Sr)RuO_3 films near the Mott-Hubbard transition, revealing key features of electron correlation effects in 4d materials consistent with theoretical predictions.
Contribution
It provides experimental evidence of Mott-Hubbard characteristics in 4d oxides, supporting the relevance of electron correlations near the metal-insulator transition.
Findings
Observation of mass enhancement in dc-limit
Detection of U/2 excitation
Identification of U excitation
Abstract
We investigated the optical properties of (Ca,Sr)RuO_3 films on the borderline of a metal-insulator (M-I) transition. Our results show all of the predicted characteristics for a metallic Mott-Hubbard system, including (i) a mass enhancement in dc-limit, (ii) an U/2 excitation, and (iii) an U excitation. Also, a self-consistency is found within the Gutzwiller-Brinkman-Rice picture for the Mott transition. Our finding displays that electron correlation should be important even in 4d materials.
Peer Reviews
No public reviews on file for this paper yet. If you reviewed it on a platform where reviews are public (OpenReview, ICLR, NeurIPS, ICML), you can paste yours below so the community can read it here.
Videos
No videos yet. Explain this paper in a talk, walkthrough, or lecture? Add one.