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- W2058771229 abstract "Although ${mathrm{LaTiO}}_{3+ensuremath{delta}}phantom{rule{0.2em}{0ex}}(0.01ensuremath{leqslant}ensuremath{delta}ensuremath{leqslant}0.12)$ is single-phase to powder x-ray diffraction, its properties reveal that a hole-poor strongly correlated electronic phase coexists with a hole-rich itinerant-electron phase. With $ensuremath{delta}ensuremath{leqslant}0.03$, the hole-rich phase exists as a minority phase of isolated, mobile itinerant-electron clusters embedded in the hole-poor phase. With $ensuremath{delta}ensuremath{geqslant}0.08$, isolated hole-poor clusters are embedded in an itinerant-electron matrix. As $ensuremath{delta}>0.08$ increases, the hole-poor clusters become smaller and more isolated until they are reduced to superparamagnetic strong-correlation fluctuations by $ensuremath{delta}=0.12$. This behavior is consistent with prediction from the virial theorem of a first-order phase change at the crossover from localized (or strongly correlated) to itinerant electronic behavior, a smaller equilibrium (Ti-O) bond length being in the itinerant-electron phase. Accordingly, the variation of volume with oxidation state does not obey V'egard's law; the itinerant-electron minority phase exerts a compressive force on the hole-poor matrix, and the hole-poor minority phase exerts a tensile stress on the hole-rich matrix." @default.
- W2058771229 created "2016-06-24" @default.
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- W2058771229 date "2005-04-29" @default.
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- W2058771229 title "Coexistence of two electronic phases in<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mrow><mml:msub><mml:mi>LaTiO</mml:mi><mml:mrow><mml:mn>3</mml:mn><mml:mo>+</mml:mo><mml:mi>δ</mml:mi></mml:mrow></mml:msub><mml:mspace width=0.2em /><mml:mrow><mml:mo>(</mml:mo><mml:mn>0.01</mml:mn><mml:mo>⩽</mml:mo><mml:mi>δ</mml:mi><mml:mo>⩽</mml:mo><mml:mn>0.12</mml:mn><mml:mo>)</mml:mo></mml:mrow></mml:mrow></mml:math>and their evolution with<mml:math xmlns:mml=http://www…" @default.
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- W2058771229 doi "https://doi.org/10.1103/physrevb.71.165119" @default.
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