Structure and Energy of Charged Domain Walls in Ferroelectrics

摘要：

The problem of the structure and energy of a charged 180-degree head-to-head domain wall is considered, using Landau theory. It was found that the scales controlling the wall structure can be very different from the Debye radius. Depending on the spontaneous polarization and the concentration of free carriers, these scales can be about the Thomas-Fermi screening length or about those typical for screening in nonlinear (Thomas-Fermi or Debye) regimes. In the typical case of perovskites, like BaTiO3, at room temperature, domain wall width is about the spatial scale of the nonlinear Thomas-Fermi screening.

作者: M.Y. Gureev A.K. Tagantsev N. Setter

作者单位: Ceramics Laboratory,Swiss Federal Institute of Technology (EPFL),CH-1015 Lausanne,Switzerland

会议类型: 国际会议

会议名称: 2009 The 18th IEEE International Symposium on Applications of Ferroelectrics(2009年国际铁电学暨IEEE国际铁电应用联合会议)

会议地点: 西安

会议语种:英文

页码: 37-42

在线出版日期: 2009-08-23（万方平台首次上网日期，不代表论文的发表时间）