Ferroelectricity driven by Y d(0)-ness with rehybridization in YMnO3
SCIE
SCOPUS
- Title
- Ferroelectricity driven by Y d(0)-ness with rehybridization in YMnO3
- Authors
- Cho, DY; Kim, JY; Park, BG; Rho, KJ; Park, JH; Noh, HJ; Kim, BJ; Oh, SJ; Park, HM; Ahn, JS; Ishibashi, H; Cheong, SW; Lee, JH; Murugavel, P; Noh, TW; Tanaka, A; Jo, T
- Date Issued
- 2007-05-25
- Publisher
- AMERICAN PHYSICAL SOC
- Abstract
- We investigated electronic structure of hexagonal multiferroic YMnO3 using the polarization dependent x-ray absorption spectroscopy (XAS) at O K and Mn L-2,L-3 edges. The spectra exhibit strong polarization dependence at both edges, reflecting anisotropic Mn 3d orbital occupation. Moreover, the O K edge spectra show that Y 4d states are strongly hybridized with O 2p ones, resulting in large anomalies in Born effective charges on off-centering Y and O ions. These results manifest that the Y d(0)-ness with rehybridization is the driving force for the ferroelectricity, and suggest a new approach to understand the multiferroicity in the hexagonal manganites.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/12446
- DOI
- 10.1103/PhysRevLett.98.217601
- ISSN
- 0031-9007
- Article Type
- Article
- Citation
- PHYSICAL REVIEW LETTERS, vol. 98, no. 21, 2007-05-25
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