论文标题
核心壳铁纳米颗粒中筛选引起的相变
Screening-Induced Phase Transitions in Core-Shell Ferroic Nanoparticles
论文作者
论文摘要
使用Landau-Ginzburg-Devonshire方法，我们研究了三种不同形状的核心壳铁纳米颗粒中筛选诱导的相变：扁盘，球体和一个针刺。纳米颗粒由铁从cuinp2s6核心制成，并由由相位变化材料制成的“可调”筛选壳覆盖，其电导率随着材料在半导体和金属相之间的变化而变化。我们揭示了壳筛选长度对纳米颗粒芯的相变和自发极化的关键影响。由于可调屏蔽壳允许控制核壳铁纳米颗粒的极性状态和相图，因此获得的结果对于在非挥发性记忆细胞中的应用可能特别感兴趣。
Using the Landau-Ginzburg-Devonshire approach, we study screening-induced phase transitions in core-shell ferroic nanoparticles for three different shapes: an oblate disk, a sphere, and a prolate needle. The nanoparticle is made of a ferroic CuInP2S6 core and covered by a "tunable" screening shell made of a phase-change material with a conductivity that varies as the material changes between semiconductor and metallic phases. We reveal a critical influence of the shell screening length on the phase transitions and spontaneous polarization of the nanoparticle core. Since the tunable screening shell allows the control of the polar state and phase diagrams of core-shell ferroic nanoparticles, the obtained results can be of particular interest for applications in nonvolatile memory cells.
