Orbital-driven Variation of Electronic Structures in Tetragonal La_<1/2>Sr_<1/2>MnO_3 as Investigated by Optical Spectroscopy
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概要
- 論文の詳細を見る
Optical conductivity spectra (σ(ω)) were investigated for coherently strained epitaxial films of tetragonal La_<1/2>Sr_<1/2>MnO_3 with various c/a ratios (1.04,1.00,and 0.98). With decreasing c/a, σ(ω) in the ground state shows a successive dramatic change from an insulating gap-like to metallic but highly incoherent spectrum, then to a pseudo-gap one, which reflects the strain-induced e_g orbital ordering/disordering and the resultant different spin structures. The variation of the electronic structure induced by such a strain-orbital coupling is discussed in comparison with some theoretical models.
- 社団法人日本物理学会の論文
- 2002-02-15
著者
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Kawasaki Masashi
Institute For Materials Research Tohoku University
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KONISHI Yoshinori
Joint Research Center for Atom Technology (JRCAT)
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IZUMI Makoto
Joint Research Center for Atom Technology (JRCAT)
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KAWASAKI Masashi
Joint Research Center for Atom Technology (JRCAT)
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TOKURA Yoshinori
Joint Research Center for Atom Technology (JRCAT)
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Okimoto Yoichi
Joint Research Center For Atom Technology (jrcat)
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Kawasaki M
Institute For Materials Research (imr) Tohoku University
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Izumi M
Research Center For Advanced Science And Technology The University Of Tokyo
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Izumi Makoto
Institute For Chemical Research Kyoto University:core Research For Evolutional Science And Technolog
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Izumi Makoto
Research Center For Advanced Science And Technology University Of Tokyo
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Kawasaki Masashi
Department Of Applied Biological Science Tokyo Noko University
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Okimoto Y
Joint Research Center For Atom Technology (jrcat)
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Kawasaki M
Joint Research Center For Atom Technology (jrcat) : Department Of Innovative And Engineered Material
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MANAKO Takashi
Joint Research Center for Atom Technology (JRCAT)
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Manako T
Nec Corp. Ibaraki Jpn
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