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:6334034

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: 6334034
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Vol. 82:26; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
ALKALINE EARTH METAL COMPOUNDS
CALCIUM COMPOUNDS
CALCIUM OXIDES
CHALCOGENIDES
CORRELATIONS
CRYSTAL MODELS
ELECTRON CORRELATION
ENERGY-LEVEL TRANSITIONS
EXCITATION
FILMS
HUBBARD MODEL
MATHEMATICAL MODELS
OPTICAL PROPERTIES
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
REFRACTORY METAL COMPOUNDS
RUTHENIUM COMPOUNDS
RUTHENIUM OXIDES
SCATTERING
STRONTIUM COMPOUNDS
STRONTIUM OXIDES
THIN FILMS
TRANSITION ELEMENT COMPOUNDS