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- W2023350916 abstract "The structural, electronic, and optical properties of pyrochlore-type Pb(2)Ir(2)O(6)O(0.55)('), which is a metal without spatial inversion symmetry at room temperature, were investigated. Structural analysis revealed that the structural distortion relevant to the breakdown of the inversion symmetry is dominated by the Pb-O' network but is very small in the Ir-O network. At the same time, gigantic second-harmonic generation signals were observed, which can only occur if the local environment of the Ir 5d electrons features broken inversion symmetry. First-principles electronic structure calculations reveal that the underlying mechanism for this phenomenon is the induction of the noncentrosymmetricity in the Ir 5d bands by the strong hybridization with O' 2p orbitals. Our results stimulate theoretical study of inversion-broken iridates, where exotic quantum states such as a topological insulator and Dirac semimetal are anticipated." @default.
- W2023350916 created "2016-06-24" @default.
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- W2023350916 date "2013-05-03" @default.
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- W2023350916 title "Mechanism of Enhanced Optical Second-Harmonic Generation in the Conducting Pyrochlore-Type<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:msub><mml:mi>Pb</mml:mi><mml:mn>2</mml:mn></mml:msub><mml:msub><mml:mi>Ir</mml:mi><mml:mn>2</mml:mn></mml:msub><mml:msub><mml:mi mathvariant=bold>O</mml:mi><mml:mrow><mml:mn>7</mml:mn><mml:mtext mathvariant=bold>−</mml:mtext><mml:mi>x</mml:mi></mml:mrow></mml:msub></mml:math>Oxide Compound" @default.
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- W2023350916 doi "https://doi.org/10.1103/physrevlett.110.187402" @default.
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