Photoemission and x-ray absorption of the electronic structure of multiferroic RMnO 3 (R=Y,Er)

J. S. Kang, S. W. Han, J. G. Park, S. C. Wi, S. S. Lee, G. Kim, H. J. Song, H. J. Shin, W. Jo, B. I. Min

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Abstract

Electronic structures of multiferroic RMnO 3 (R=Y,Er) have been investigated by employing photoemission spectroscopy (PES) and x-ray absorption spectroscopy (XAS). We have found that Mn ions in RMnO 3 are in the trivalent high-spin state with the total spin of S=2. The occupied Mn (d xz-d yz) states lie deep below E F, while the occupied Mn (d xy-d x2-y2) states overlap very much with the O 2p states. It is observed that the PES spectral intensity of Mn 3d states is negligible above the occupied O 2p bands, suggesting that YMnO 3 is likely to be a charge-transfer insulator. The Mn d 3z2-r2 state is mostly unoccupied in the ferroelectric phase of YMnO 3.

Original languageEnglish
Article number092405
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume71
Issue number9
DOIs
StatePublished - 1 Mar 2005

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