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dc.contributor.authorChen, J. M.en_US
dc.contributor.authorLee, J. M.en_US
dc.contributor.authorChou, T. L.en_US
dc.contributor.authorChen, S. A.en_US
dc.contributor.authorHuang, S. W.en_US
dc.contributor.authorJeng, H. T.en_US
dc.contributor.authorLu, K. T.en_US
dc.contributor.authorChen, T. H.en_US
dc.contributor.authorLiang, Y. C.en_US
dc.contributor.authorChen, S. W.en_US
dc.contributor.authorChuang, W. T.en_US
dc.contributor.authorSheu, H-S.en_US
dc.contributor.authorHiraoka, N.en_US
dc.contributor.authorIshii, H.en_US
dc.contributor.authorTsuei, K. D.en_US
dc.contributor.authorHuang, Eugeneen_US
dc.contributor.authorLin, C. M.en_US
dc.contributor.authorYang, T. J.en_US
dc.description.abstractVariations in the electronic structure and structural distortion in multiferroic DyMnO3 were probed by synchrotron x-ray diffraction, lifetime-broadening-suppressed x-ray absorption spectroscopy (XAS), and ab initio electronic structure calculations. The refined x-ray diffraction data enabled an observation of a diminished local Jahn-Teller distortion of Mn sites within MnO6 octahedra in DyMnO3 on applying the hydrostatic pressure. The intensity of the white line in Mn K-edge x-ray absorption spectra of DyMnO3 progressively increased with the increasing pressure. With the increasing hydrostatic pressure, the absorption threshold of an Mn K-edge spectra of DyMnO3 shifted toward a greater energy, whereas the pre-edge line slightly shifted to a smaller energy. We provide the spectral evidence for the pressure-induced bandwidth broadening for manganites. The intensity enhancement of the white line in Mn K-edge spectra is attributed to a diminished Jahn-Teller distortion of MnO6 octahedra in compressed DyMnO3. A comparison of the pressure-dependent XAS spectra with the ab initio electronic structure calculations and full calculations of multiple scattering using the code FDMNES shows the satisfactory agreement between experimental and calculated Mn K-edge spectra. (C) 2010 American Institute of Physics. [doi:10.1063/1.3490400]en_US
dc.titlePressure-dependent electronic structures in multiferroic DyMnO3: A combined lifetime-broadening-suppressed x-ray absorption spectroscopy and ab initio electronic structure studyen_US
dc.identifier.journalJOURNAL OF CHEMICAL PHYSICSen_US
dc.contributor.departmentDepartment of Electrophysicsen_US
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