二维铁电材料的第一性原理研究进展

doi:10.16180/j.cnki.issn1007-7820.2021.10.013

摘要/Abstract

摘要：

由于二维铁电体固有的尺寸和表面效应,其铁电性能与传统的块状铁电体有较大的不同。到目前为止,二维铁电体已被报道具有多种性质,包括体光电效应、压电/热释电效应、谷极化和自旋极化。这些性质或依赖于铁电极化,或与之耦合以便于电学控制,从而使二维铁电体适用于多功能纳米器件。目前,二维铁电体在理论、实验和应用方面的研究正在不断积累。文中简要介绍了采用第一性原理研究二维铁电材料的理论和方法,并分别总结了二维铁电性的本征与非本征起源,最后讨论了二维铁电体存在的问题及发展前景。

关键词: 二维铁电材料, 第一性原理, 铁电极化, 光电效应, 谷极化, 自旋极化, 本征, 非本征起源

Abstract:

Due to its inherent size and surface effect, the ferroelectric properties of two-dimensional ferroelectrics are very different from those of traditional bulk ferroelectrics. So far, two-dimensional ferroelectrics have been reported to have many properties, including bulk photoelectric effect, piezoelectric / pyroelectric effect, valley polarization and spin polarization. These properties either depend on ferroelectric polarization or couple with it for electrical control, which makes 2D ferroelectrics suitable for multi-functional nano devices. At present, the research of two-dimensional ferroelectrics in theory, experiment and application is accumulating. This study briefly introduces these theories and methods. Then, the intrinsic and extrinsic origins of two-dimensional ferroelectrics are summarized respectively. Finally, the existing problems and development prospects of two-dimensional ferroelectrics are discussed.

Key words: two dimensional ferroelectric materials, first principles, ferroelectric polarization, photoelectric effect, valley polarization, spin polarization, intrinsic, extrinsic origins

中图分类号:

TN432

吴春香,仲崇贵. 二维铁电材料的第一性原理研究进展[J]. 电子科技, 2021, 34(10): 81-86.

WU Chunxiang,ZHONG Chonggui. First Principles Research Progress of Two Dimensional Ferroelectric Materials[J]. Electronic Science and Technology, 2021, 34(10): 81-86.

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