Domain structures of ferroelectric nanotubes controlled by surface charge compensation

Jie Wang, Marc Kamlah
2008 Applied Physics Letters  
Domain structures in ferroelectric nanotubes (FNTs) under different electrical boundary conditions are predicted through a phase field model. Simulation results show that domain structures are highly dependent on the compensation of polarization-induced surface charges. In order to reduce the depolarization energy, polarizations in FNTs form a vortex structure under an open-circuit boundary condition. When surface charges are compensated on the inner and outer surfaces, a multi-domain structure
more » ... ti-domain structure is formed in FNTs as a result of competition between the long-range electrostatic and elastic interactions. However, a singledomain structure is energically favourable in FNTs if the upper and lower surfaces are shortcircuited.
doi:10.1063/1.2966366 fatcat:7uah2kqujva2ndnl3nmbq54of4