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• W2039789964 abstract "To elucidate charge and orbital order below the Verwey transition temperature ${T}_{mathrm{V}}ensuremath{sim}125$ K, a thin layer of magnetite partially detwined by growth on the stepped MgO(001) substrate has been studied by means of soft x-ray diffraction at the Fe ${L}_{2,3}$ resonance. The azimuth angle, incident photon polarization, and energy dependence of the ${(00frac{1}{2})}_{c}$ and ${(001)}_{c}$ reflection intensities have been measured, and analyzed using a configuration-interaction FeO${}_{6}$ cluster model. The azimuth dependence of the ${(00frac{1}{2})}_{c}$ reflection intensities directly represents the space-group symmetry of the orbital order in the initial state rather than indirectly through the intermediate-state level shifts caused by the order-induced lattice distortions. From the analysis of the ${(00frac{1}{2})}_{c}$ reflection intensities, the orbital order in the ${t}_{2g}$ orbitals of $B$ sites below ${T}_{mathrm{V}}$ is proved to have a large monoclinic deformation with the value of $mathrm{Re}[{F}_{xy}]/mathrm{Re}[{F}_{yz}]ensuremath{sim}2$. This finding contradicts the majority of theories on the Verwey transition so far proposed. We show that the experimentally observed resonance spectra cannot be explained by orbital and charge orders obtained with recent LDA+$U$ and GGA+$U$ band structure calculations but by a complex-number orbital order with excellent agreement." @default.
• W2039789964 created "2016-06-24" @default.
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• W2039789964 date "2013-11-06" @default.
• W2039789964 modified "2023-10-16" @default.
• W2039789964 title "Analysis of charge and orbital order in Fe<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:msub><mml:mrow /><mml:mn>3</mml:mn></mml:msub></mml:math>O<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:msub><mml:mrow /><mml:mn>4</mml:mn></mml:msub></mml:math>by Fe<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:msub><mml:mi>L</mml:mi><mml:mrow><mml:mn>2</mml:mn><mml:mo>,</mml:mo><mml:mn>3</mml:mn></mml:mrow></…" @default.
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• W2039789964 doi "https://doi.org/10.1103/physrevb.88.195110" @default.
• W2039789964 hasPublicationYear "2013" @default.
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