期刊
PHYSICAL REVIEW B
卷 81, 期 14, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.81.144128
关键词
-
资金
- ONR [N00014-04-1-0413, N00014-08-1-0915]
- NSF [DMR 0701558, DMR-0404335]
- DOE [DE-SC0002220]
- University of South Florida [R074021]
- EU STREP Macomufi
- ANR Pnano
- C-Nano Ile de France
- PRES Universud
- U.S. Department of Energy (DOE) [DE-SC0002220] Funding Source: U.S. Department of Energy (DOE)
- EPSCoR
- Office Of The Director [0918970] Funding Source: National Science Foundation
Combining density-functional calculations and x-ray diffraction experiments, we show that BiFeO3 epitaxially grown under compressive strain on cubic substrates evolves from the monoclinic Cc phase (resulting from the strain-induced deformation of the ground-state rhombohedral R3c phase) to the monoclinic Cm phase with increasing misfit, the transition being at about -4.5%/-5.5%. Moreover, the polarization of the Cc phase only rotates (instead of increasing) for misfit strain ranging from 0% to -4%, due to a strong coupling between polar displacements and oxygen octahedra tilts. This strong interaction is of interest for multiferroics where usually both structural degrees of freedom coexist.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据