物理学进展 ›› 2020, Vol. 40 ›› Issue (4): 107-128.

所属专题: 2023年, 第43卷

• •    下一篇

室温稳定的二维铁电材料:CuInS2P6 及其异质结构

万逸, 阚二军
  

  1. 南京理工大学理学院应用物理系,南京210094
  • 收稿日期:2020-06-08 修回日期:2020-06-10 接受日期:2020-06-20 出版日期:2020-11-05 发布日期:2020-11-25

Room-temperature stable two-dimensional ferroelectric materials: CuInS2P6 and heterostructures

Wan Yi, Kan Er-jun   

  1. Department of Applied Physics, School of Science, Nanjing University of Science and Technology, Nanjing, 210094
  • Received:2020-06-08 Revised:2020-06-10 Accepted:2020-06-20 Online:2020-11-05 Published:2020-11-25
  • Supported by:
    the NSFC (51522206, 11574151, 11774173 and 51790492), and the fundamental research funds for the central universities
    (30915011203, 30918011334, 30919011403 and 30920021152).

摘要:

二维铁电材料有助于实现半导体性质与非易失存储特性在微纳尺度上的有机结合,在高集成化电子器件、光电器件、能量收集、及机电耦合系统等领域展现出巨大的应用潜力。二维铁电材料的层状结构,保证了原子层间的可剥离性,为从理论和实验上探索超薄极限下的铁电性质提供理想的研究平台。考虑到二维磁性研究的低温瓶颈,二维铁电材料为实现铁性功能材料的高温器件化与实用化提供了新途径。在本文中,我们介绍了一种室温稳定的二维铁电材料:铜铟硫代磷酸盐(CuInP2S6)。该材料体系的科学内涵和应用前景,引发了新的研究热潮。在本文中,关于其较高的铁电居里转变温度、显著的压电响应、巨大的负纵向压电系数、可调谐的四重势阱铁电特性、以及基于该材料及其异质结构的器件研究,均有所涉及。我们还简要介绍了几种过渡金属硫代磷酸盐化合物材料体系(MIMIIIP2(S/Se)6)中的其他代表性材料。最后,我们关于二维铁电材料研究的未来发展方向进行了讨论。

关键词: 铜铟硫代磷酸盐, 二维铁电, 负压电性, 可调谐四重势阱铁电性

Abstract:

Two-dimensional (2D) ferroelectric materials offering a combination of semiconductor properties and non-volatile memory properties at the nanoscale, have recently shown great potentials for applications with enhanced integration in electronic and optoelectronic devices, energy harvesting, and electro-mechanical systems. The laminar structure of 2D ferroelectrics guarantees the atomic-layer cleavability, providing an ideal platform for exploring ferroelectricity at the ultrathin limit theoretically and experimentally. In consideration of the low-temperature bottleneck in burgeoning 2D magnetism, 2D ferroelectricity opens up the practical approaches at higher temperature. In this article, we reviewed a kind of laminar materials exhibiting room-temperature stable switchable ferroelectricity, copper indium thiophosphate (CuInP2S6), the potential of which to excavate new science and technology has awakened considerable research interest. The observed high Curie transition temperature, the significant piezoelectric responses, the giant negative piezoelectricity and tunable quadruplewell piezoelectricity, together with the potential of atomic-scale CuInP2S6 films for the novel ferroelectric polarization-based devices, are all demonstrated. A brief introduction about the other typical materials belonging to the transition metal thiophosphate (MIMIIIP2(S/Se)6) compounds family is also involved. The future directions for 2D ferroelectricity research are finally discussed.

Key words: Copper indium thiophosphate, Two-dimensional ferroelectricity, Negative piezoelectricity, Tunable quadruple-well ferroelectricity

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