Dynamic properties of phase diagram in cylindrical ferroelectric nanotubes |
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Authors: | CD Wang ZZ LuWX Yuan SY KwokBH Teng |
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Institution: | a Center of Super-Diamond and Advanced Films (COSDAF) and Department of Physics and Materials Science, City University of Hong Kong, Hong Kong SAR, China b School of Physical Electronics, University of Electronic Science and Technology of China, Chengdu 610054, PR China |
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Abstract: | The dynamic properties of phase diagrams in cylindrical ferroelectric nanotubes were investigated by utilizing the effective-field theory with correlations. Three different structure mechanisms are discussed by performing three different interaction functions. Effects of structure factors of the ferroelectric nanotubes are shown in phase diagrams. A linear relation between the crossover value of transverse field in inner-layer of nanotube and the exchange interaction are revealed. Moreover, for the first time, the phase transition characteristics are shown both in 2-D and 3-D phase diagrams by comparing the variations of the ferroelectric region and the morphology vividly. In comparison, results of the usual mean-field approximation are also presented in some phase diagrams, it suggest that the differential operator technique with correlations reduces some extent of the ferroelectric features of the ferroelectric nanotube. |
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Keywords: | Ferroelectrics Phase diagrams Cylindrical nanotube |
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