Spectral evolution in (Ca,Sr)RuO_3 near the Mott-Hubbard transition

Germany); H. S. Choi; J. Bak; J. E. Han (Max-Planck Inst.; J. H. Cho (Pusan Nat'l U.; J. S. Ahn; Korea); Q. X. Xia (LANL; T. W. Noh (Seoul Nat'l U.; USA)

arxiv: cond-mat/9807209 · v1 · submitted 1998-07-14 · ❄️ cond-mat.str-el

Spectral evolution in (Ca,Sr)RuO₃ 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.

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J. H. Cho (Pusan Nat'l U. Q. X. Xia (LANL USA)

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keywords transitionexcitationmott-hubbardborderlinecharacteristicscorrelationdc-limitdisplays

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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.

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Spectral evolution in (Ca,Sr)RuO₃ near the Mott-Hubbard transition

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