Controllability of vortex domain structure in ferroelectric nanodot: fruitful domain patterns and transformation paths.
Controllability of vortex domain structure in ferroelectric nanodot: fruitful domain patterns and transformation paths.
复制标题
铁电纳米点涡旋畴结构的可控性:富有成效的畴模式和转变
DOI:
10.1038/srep03946
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发表时间:
2014-02-04
影响因子:
4.6
通讯作者:
Woo CH
中科院分区:
文献类型:
--
作者:
Wu CM;Chen WJ;Zheng Y;Ma DC;Wang B;Liu JY;Woo CH
Ferroelectric vortex domain structure which exists in low-dimensional ferroelectrics is being intensively researched for future applications in functional nanodevices. Here we demonstrate that adjusting surface charge screening in combination with temperature can provide an efficient way to gain control of vortex domain structure in ferroelectric nanodot. Systematical simulating experiments have been conducted to reveal the stability and evolution mechanisms of domain structure in ferroelectric nanodot under various conditions, including processes of cooling-down/heating-up under different surface charge screening conditions, and increasing/decreasing surface charge screening at different temperatures. Fruitful phase diagrams as functions of surface screening and temperature are presented, together with evolution paths of various domain patterns. Calculations discover up to 25 different kinds of domain patterns and 22 typical evolution paths of phase transitions. The fruitful controllability of vortex domain structure by surface charge screening in combination with temperature should shed light on prospective nanodevice applications of low-dimensional ferroelectric nanostructures.
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