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Semiconductor Physics, Quantum Electronics & Optoelectronics. 2008. V. 11, N 4. P. 370-380.
Polar properties and local piezoelectric response of ferroelectric nanotubes
1V. Lashkaryov Institute of Semiconductor Physics, National Academy of Science of Ukraine
41, prospect Nauky, 03028 Kyiv, Ukraine
Abstract. We consider the polar properties of the ferroelectric nanotubes within the
framework of Landau-Ginzburg-Devonshire phenomenology. The approximate
analytical expression for the paraelectric-ferroelectric transition temperature dependence
on the radii of nanotube, polarization gradient, extrapolation length, elastic stresses and
strains arising from surface tension and thermal expansion mismatch, and electrostriction
coefficient was derived. We calculated effective local piezoresponse of the ferroelectric
nanotube within decoupling approximation of electric and elastic problem. Obtained
results explain the ferroelectricity conservation in Pb(Zr,Ti)O 3 and BaTiO 3 nanotubes
observed by using Piezoelectric Force Microscopy.
Keywords: polar properties, ferroelectric nanotube, effective local piezoresponse,
piezoelectric force microscopy.
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