D. J. Huang

Orbital ordering in La0.5Sr1.5MnO4 studied by soft x-ray linear dichroism

We found that the conventional model of orbital-ordering of 3x(2)-r(2)/3y(2)-r(2) type in the e(g) states of La0.5Sr1.5MnO4 is incompatible with measurements of linear dichroism in the Mn 2p-edge x-ray absorption, whereas these e(g) states exhibit predominantly cross-type orbital ordering of x(2)-z(2)/y(2)-z(2). LDA+U band-structure calculations reveal that such a cross-type orbital-ordering results from a combined effect of antiferromagnetic structure, Jahn-Teller distortion, and on-site Coulomb interactions.

Spin-resolved photoemission studies of epitaxial Fe3O4(100) thin films

Abstract In situ spin-resolved photoemission studies have been performed on expitaxial Fe 3 O 4 thin films grown on MgO(1xa00xa00). The spin polarization of the valence band at the Fermi level has been found to be −55.5% and not −100% as predicted by the first-principles calculations. Our spin-resolved measurements provide direct experimental evidence showing that Fe 3 O 4 is not a half-metal as a result of electron–electron correlation effects, and that Fe 3 O 4 should be considered as a strongly correlated system.

Orbital symmetry and electron correlation in NaxCoO2.

Measurements of polarization-dependent soft x-ray absorption reveal that the electronic states determining the low-energy excitations of

Performance of a Mott detector for undulator-based spin-resolved spectroscopy

{mathrm{Na}}_{x}{mathrm{CoO}}_{2}

Raman and fluorescence characteristics of resonant inelastic X-ray scattering from doped superconducting cuprates

have predominantly

Magnetic Transitions of Multiferroic Frustrated Magnets Revealed by Resonant Soft X-ray Magnetic Scattering

{a}_{1g}

ELECTRON CORRELATION EFFECTS IN HALF-METALLIC TRANSITION METAL OXIDES

symmetry with significant O

Doping Dependence of Collective Spin and Orbital Excitations in the Spin-1 Quantum Antiferromagnet La2-xSrxNiO4 Observed by X Rays

2p

Strong localization of oxidized Co3+ state in cobalt-hexacyanoferrate

character. In contrast to the prediction of band theory, doping-dependent O

Orbital symmetry and electron correlation in NaxCoO2NaxCoO2

1s