journal article·2024-06Open access

Chemical Vapor Deposition Synthesis of Intrinsic High‐Temperature Ferroelectric 2D CuCrSe2

Ping Wang, Yang Zhao, Rui Na, Weikang Dong, Jingyi Duan, Yue Cheng, Boyu Xu, Denan Kong, Jijian Liu, Shuang Du, Chunyu Zhao, Yang Yang, Lu Lv, Qingmei Hu, Hui Ai, Yan Xiong, Vasily S. Stolyarov, Shoujun Zheng, Yao Zhou, Fang Deng, Jiadong Zhou

Advanced Materials· Volume 36· Issue 23

Abstract

Abstract Ultrathin 2D ferroelectrics with high Curie temperature are critical for multifunctional ferroelectric devices. However, the ferroelectric spontaneous polarization is consistently broken by the strong thermal fluctuations at high temperature, resulting in the rare discovery of high‐temperature ferroelectricity in 2D materials. Here, a chemical vapor deposition method is reported to synthesize 2D CuCrSe2 nanosheets. The crystal structure is confirmed by scanning transmission electron microscopy characterization. The measured ferroelectric phase transition temperature of ultrathin CuCrSe2 is about ≈800 K. Significantly, the switchable ferroelectric polarization is observed in ≈5.2 nm nanosheet. Moreover, the in‐plane and out‐of‐plane ferroelectric response are modulated by different maximum bias voltage. This work provides a new insight into the construction of 2D ferroelectrics with high Curie temperature.
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Research context

OpenAlex topics: Ferroelectric and Piezoelectric Materials · 2D Materials and Applications · Advanced Thermoelectric Materials and Devices

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Centre for Quantum Physics Key Laboratory of Advanced Optoelectronic Quantum Architecture and Measurement (MOE) School of Physics Beijing Institute of Technology Beijing 100081 China

Advanced Research Institute of Multidisciplinary Sciences Beijing Institute of Technology Beijing 100081 China

Yangtze Delta Region Academy of Beijing Institute of Technology Jiaxing 314000 China

Analysis & Testing Center in Beijing Institute of Technology Beijing Institute of Technology Beijing 100081 China

Center for Advanced Mesoscience and Nanotechnology Moscow Institute of Physics and Technology Dolgoprudny Moscow 141700 Russia

Advanced Research Institute of Multidisciplinary Science and School of Chemistry and Chemical Engineering Beijing Institute of Technology Beijing 100081 China

National Key Lab of Autonomous Intelligent Unmanned Systems and School of Automation Beijing Institute of Technology Beijing 100081 China

Funding

National Basic Research Program of China · National Natural Science Foundation of China · Natural Science Foundation of Beijing Municipality

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