Observation of intrinsic crystal phase in bare few-layer CrI3
Observation of intrinsic crystal phase in bare few-layer CrI3
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裸露少层 CrI3 中本征晶相的观察
DOI：
10.1515/nanoph-2022-0246
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发表时间：
2022-04
期刊：
影响因子：
7.5
通讯作者：
Bo Peng
中科院分区：
文献类型：
--
作者：
Zhen Liu;Yongzheng Guo;Zhiyong Chen;Tao Gong;Yue Li;Yuting Niu;Yingchun Cheng;Haipeng Lu;Longjiang Deng;Bo Peng
抽象。本征结构相是基本物理性质的关键基础，也是创造具有前所未有的性能和独特功能的创新器件的关键基础。货车德瓦耳斯CrI 3的长程铁磁有序与层间堆积有序密切相关。然而，少层CrI 3的本征结构仍然难以捉摸;预测的单斜相尚未在裸露的少层CrI 3中实验检测到。在这里，我们揭示了层间反铁磁耦合的少层CrI 3的本征结构，它明确地显示在裸和hBN封装的双层和三五层CrI 3在整个温度范围从300至10 K的单斜堆积。实验观察到hBN/CrI 3/hBN异质结构中hBN封装层的奇异弹簧阻尼效应，这部分阻碍了CrI 3的层间滑动。这项工作展示了少层CrI 3的内在单斜晶相以及与磁序的相关性，为通过堆叠设计创建磁性织构提供了许多机会。
Abstract. Intrinsic structural phase is a crucial foundation for the fundamental physical properties, and for creating innovative devices with unprecedented performances and unique functionalities. Long-range ferromagnetic orders of van der Waals CrI3 are strongly tied with interlayer stacking orders. However, the intrinsic structure of few-layer CrI3 still remains elusive; the predicted monoclinic phase has not yet been experimentally detected in bare few-layer CrI3. Here we uncover the intrinsic structure of few-layer CrI3 with interlayer antiferromagnetic coupling, which unambiguously show monoclinic stacking in both bare and hBN-encapsulated bilayer and tri-five-layer CrI3 throughout an entire temperature range from 300 to 10K. An exotic spring damping effect from hBN encapsulation layers is experimentally observed in hBN/CrI3/hBN heterostructures, which partly hinders interlayer sliding of CrI3. This work demonstrates the intrinsic monoclinic crystal phase of few-layer CrI3 and associated correlation with magnetic orders, opening up numerous opportunities for creating magnetic texture by stacking design.
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