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Spectral Evolution in(Ca,Sr)RuO3near the Mott-Hubbard Transition

J. S. Ahn, J. Bak, H. S. Choi, T. W. Noh, J. E. Han, Yunkyu Bang, J. H. Cho, Q. X. Jia
1999 Physical Review Letters  

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1998 pre-print arXiv:cond-mat/9807209v1 fatcat:gm6iolababcbzkgn36nguv6ofu
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.
doi:10.1103/physrevlett.82.5321 fatcat:bhl5xtlsqjhj5oe2mddvcnnaf4
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J. S. Ahn, J. Bak, H. S. Choi, T. W. Noh, J. E. Han, Yunkyu Bang, J. H. Cho, Q. X. Jia. "Spectral Evolution in(Ca,Sr)RuO3near the Mott-Hubbard Transition." Physical Review Letters 82.26 (1999) 5321-5324