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Article
Exchange interaction mediated ferroelectricity in multiferroic MnTiO3 with anisotropic orbital hybridization and hole delocalization
Australian Institute for Innovative Materials - Papers
  • ShiWei Chen, National Synchrotron Radiation Research Center
  • Paoan Lin, National Tsing Hua University
  • Horngtay Jeng, National Tsing Hua University
  • S W Fu, National Synchrotron Radiation Research Center
  • Jennmin Lee, National Synchrotron Radiation Research Center
  • Jyhfu Lee, National Synchrotron Radiation Research Center
  • Chihwen Pao, National Synchrotron Radiation Research Center
  • Hirofumi Ishii, National Synchrotron Radiation Research Center
  • Kuding Tsuei, National Synchrotron Radiation Research Center
  • Nozomu Hiraoka, National Synchrotron Radiation Research Center
  • Dapeng Chen, University of Wollongong
  • S X Dou, University of Wollongong
  • Xiaolin Wang, University of Wollongong
  • Kueihtzu Lu, National Synchrotron Radiation Research Center
  • Jinming Chen, National Synchrotron Radiation Research Center
RIS ID
88932
Publication Date
1-1-2014
Publication Details

Chen, S. W., Lin, P. A., Jeng, H. T., Fu, S. W., Lee, J. M., Lee, J. F., Pao, C. W., Ishii, H., Tsuei, K. D., Hiraoka, N., Chen, D. P., Dou, S. X., Wang, X. L., Lu, K. T. & Chen, J. M. (2014). Exchange interaction mediated ferroelectricity in multiferroic MnTiO3 with anisotropic orbital hybridization and hole delocalization. Applied Physics Letters, 104 (8), 082104-1-082104-5.

Abstract
We present the orbital structure of MnTiO3 with polarization dependent x-ray absorption and resonant x-ray emission spectra accompanied with electronic structure calculations. The results clearly indicate a strongly anisotropic O 2p-Mn 3d orbital hybridization whereas the Mn 3d hole state shows a highly delocalized characteristic ascribed to the 3d-4p mixing. The extended Mn 4p orbital could enhance the exchange interaction between Mn (3d)-O (2p)-Mn (3d) leading to an asymmetric charge distribution in Mn-O bonds. The delocalized characteristic of Mn 3d holes is indispensable to the mechanism of spin-dependent-metal-ligand hybridization to explain magnetically induced ferroelectricity.
Grant Number
ARC/DP0987190
Citation Information
ShiWei Chen, Paoan Lin, Horngtay Jeng, S W Fu, et al.. "Exchange interaction mediated ferroelectricity in multiferroic MnTiO3 with anisotropic orbital hybridization and hole delocalization" (2014)
Available at: http://works.bepress.com/sxdou/588/