Ferroelectricity in molecular solids: a review of electrodynamic properties
Ferroelectricity in molecular solids: a review of electrodynamic properties
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DOI：
10.1088/0034-4885/78/9/096501
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发表时间：
2015-07
影响因子：
18.1
通讯作者：
Silvia Tomić;M. Dressel
中科院分区：
文献类型：
--
作者：
Silvia Tomić;M. Dressel
在传统的铁电体中，极化是由正离子和负离子由于晶格畸变而产生的相对位移或由永久电偶极子的集体排列引起的。具有反转对称破缺基态的强关联材料具有电子铁电性，由于其重要的基础和技术重要性，这种现象最近引起了凝聚态物理学家的注意。一维和二维分子固体中电子铁电性的发现是一个令人兴奋的发展，因为它们表现出丰富的非线性性质和复杂的电动力学，包括非平凡的涌现激发。我们总结了关键的实验结果，概述了目前的理论认识，并概述了这一现象的前景，这对未来的电子器件具有很大的潜力。
In conventional ferroelectrics the polarization is induced either by the relative displacement of positive and negative ions due to a lattice distortion or by the collective alignment of permanent electric dipoles. Strongly correlated materials with the inversion-symmetry-broken ground states feature electronic ferroelectricity, a phenomenon which has recently caught the attention of condensed matter physicists due to its great fundamental and technological importance. The discovery of electronic ferroelectricity in one and two-dimensional molecular solids is an exciting development because they show a rich variety of nonlinear properties and complex electrodynamics, including nontrivial emergent excitations. We summarize key experimental results, sketch the current theoretical understanding and outline promising prospects of this phenomenon which have great potential for future electronic devices.