journal article·2021

Epitaxial growth of large-grain-size ferromagnetic monolayer CrI 3 for valley Zeeman splitting enhancement

Lipeng Gong, Cheng Zhang, Anmin Nie, Changqing Lin, Hao Zhang, Chaofeng Gao, Meng Wang, Xi Zhang, Nannan Han, Huimin Su, Chen Lin, Yizheng Jin, Chenhui Zhang, Xixiang Zhang, Jun-Feng Dai, Yingchun Cheng, Wei Huang

Nanoscale· Volume 13· Issue 5
Publisher page

Abstract

Two-dimensional (2D) magnetic CrI3 has received considerable research attention because of its intrinsic features, including insulation, Ising ferromagnetism, and stacking-order-dependent magnetism, as well as potential in spintronic applications. However, the current strategy for the production of ambient-unstable CrI3 thin layer is limited to mechanical exfoliation, which normally suffers from uncontrollable layer thickness, small size, and low yet unpredictable yield. Here, via a confined vapor epitaxy (CVE) method, we demonstrate the mass production of flower-like CrI3 monolayers on mica. Interestingly, we discovered the crucial role of K ions on the mica surface in determining the morphology of monolayer CrI3, reacting with precursors to form a KIx buffer layer. Meanwhile, the transport agent affects the thickness and size of the as-grown CrI3. Moreover, the Curie temperature of CrI3 is greatly affected by the interaction between CrI3 and the substrate. The monolayer CrI3 on mica could act as a magnetic substrate for valley Zeeman splitting enhancement of WSe2. We reckon our work represents a major advancement in the mass production of monolayer 2D CrI3 and anticipate that our growth strategy may be extended to other transition metal halides.
Source: europepmc · Quality: candidate unverified · Source record ↗

Research context

OpenAlex topics: 2D Materials and Applications · Perovskite Materials and Applications · Neural Networks and Reservoir Computing

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

Affiliations

Key Laboratory of Flexible Electronics & Institute of Advanced Materials

Jiangsu National Synergetic Innovation Center for Advanced Materials

Nanjing Tech University

Nanjing 211816

China

Shenzhen Institute for Quantum Science and Engineering

and Department of Physics

Southern University of Science and Technology

Shenzhen 518055

Center for High Pressure Science

State Key Lab of Metastable Materials Science and Technology

Yanshan University

Qinhuangdao 066004

Frontiers Science Center for Flexible Electronics

Xi'an Institute of Flexible Electronics (IFE) and Xi'an Institute of Biomedical Materials & Engineering

Northwestern Polytechnical University

Xi'an 710072

State Key Laboratory of Silicon Materials

Centre for Chemistry of High-Performance & Novel Materials

School of Materials Science and Engineering

Zhejiang University

Hangzhou 310027

Physical Science and Engineering Division (PSE)

King Abdullah University of Science and Technology (KAUST)

Thuwal 23955-6900

Funding

National Natural Science Foundation of China · Fundamental Research Funds for the Central Universities · King Abdullah University of Science and Technology

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