多铁性
磁性
铁电性
材料科学
堆积
凝聚态物理
纳米技术
核磁共振
物理
光电子学
电介质
作者
Wei Xun,Chao Wu,Hanbo Sun,Weixi Zhang,Yin‐Zhong Wu,Ping Li
出处
期刊:Nano Letters
[American Chemical Society]
日期:2024-03-07
标识
DOI:10.1021/acs.nanolett.4c00597
摘要
Two-dimensional (2D) multiferroic materials have widespread application prospects in facilitating the integration and miniaturization of nanodevices. However, the magnetic, ferroelectric, and ferrovalley properties in one 2D material are rarely coupled. Here, we propose a mechanism for manipulating magnetism, ferroelectric, and valley polarization by interlayer sliding in a 2D bilayer material. Monolayer GdI2 is a ferromagnetic semiconductor with a valley polarization of up to 155.5 meV. More interestingly, the magnetism and valley polarization of bilayer GdI2 can be strongly coupled by sliding ferroelectricity, making these tunable and reversible. In addition, we uncover the microscopic mechanism of the magnetic phase transition by a spin Hamiltonian and electron hopping between layers. Our findings offer a new direction for investigating 2D multiferroic devices with implications for next-generation electronic, valleytronic, and spintronic devices.
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