Spectral Evolution in (Ca,Sr)RuO{sub 3} near the Mott-Hubbard Transition

Journal Article · Tue Jun 01 04:00:00 EDT 1999 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.82.5321· OSTI ID:365964

Ahn, J S; Bak, J; Choi, H S; Noh, T W ^[1]; Han, J E ^[2]; Bang, Y ^[3]; Cho, J H ^[4]; Jia, Q X ^[5]

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1. Department of Physics, Seoul National University, Seoul 151-742 (Korea)
2. Max-Planck Institut fuer Festkoerperforschung, Heisenbergstrasse 1, D-70569, Stuttgart (Germany)
3. Department of Physics, Chonnam National University, Kwangju 500-757 (Korea)
4. RCDAMP and Department of Physics, Pusan National University, Pusan 609-735 (Korea)
5. Superconductivity Technology Center, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)

We investigated optical properties of (Ca,Sr)RuO {sub 3} films on the borderline of a metal-insulator transition. Our results show all of the predicted characteristics for a metallic Mott-Hubbard system, including (i) a mass enhancement in dc limit, (ii) a U/2 excitation, and (iii) a U excitation. Also, self-consistency is exploited within the Gutzwiller-Brinkman-Rice picture for the Mott transition. Our finding displays that electron correlation should be important even in 4d materials. However, low frequency behaviors of electrodynamic quantities suggest extra scattering mechanisms in addition to the Mott-Hubbard correlation. {copyright} {ital 1999} {ital The American Physical Society }

• OSTI ID: 365964
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 26 Vol. 82; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CALCIUM OXIDES
ELECTRON CORRELATION
EXCITATION
HUBBARD MODEL
OPTICAL PROPERTIES
RUTHENIUM OXIDES
SCATTERING
STRONTIUM OXIDES
THIN FILMS