journal article·2022

Directed exfoliating and ordered stacking of transition-metal-dichalcogenides

Yanshuang Li, Xiuhua Xie, Binghui Li, Xiaoli Sun, Yichen Yang, Jishan Liu, Jiying Feng, Ying Zhou, Yuanzheng Li, Weizhen Liu, Shuangpeng Wang, Wei Wang, Huan Zeng, Zhenzhong Zhang, Dawei Shen, Dezhen Shen

Nanoscale· Volume 14· Issue 20
Publisher page

Abstract

Two-dimensional van der Waals crystals provide a limitless scope for designing novel combinations of physical properties by controlling the stacking order or twist angle of individual layers. Lattice orientation between stacked monolayers is significant not only for breaking the engineering symmetry but also for the study of many-body quantum phases and band topology. Thus far the state-of-the-art exfoliation approaches focus on the achievements of quality, size, yield, and scalability, while lacking sufficient information on lattice orientation. Consequently, interlayer alignment is usually determined by later experiments, such as the second harmonic generation spectroscopy, which increase the number of trials and errors for a designed artificial ordering and hampered the efficiency of systematic study. Herein, we report a lattice orientation distinguishable exfoliation method via gold favor epitaxy along the specific atomic step edges, meanwhile, fulfilling the requirements of high-quality, large-size, and high-yield monolayers. Hexagonal- and rhombohedral-stacking configurations of bilayer transition metal dichalcogenides are built directly at once as a result of foreseeing the lattice orientation. Optical spectroscopy, electron diffraction, and angle-resolved photoemission spectroscopy are used to study crystal quality, symmetric breaking, and band tuning, which support the exfoliating mechanism we proposed. This strategy shows the ability to facilitate the development of ordering stacking especially for multilayers assembling in the future.
Source: europepmc · Quality: candidate unverified · Source record ↗

Research context

OpenAlex topics: 2D Materials and Applications · Luminescence and Fluorescent Materials · Photochromic and Fluorescence Chemistry

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

Affiliations

State Key Laboratory of Luminescence and Applications, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, No. 3888 Dongnanhu Road, Changchun, 130033, People's Republic of China

University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China

Institute of Theoretical Chemistry, Jilin University, Changchun 130023, People's Republic of China

Center for Excellence in Superconducting Electronics, State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050, China

Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China

Key Laboratory of UV-Emitting Materials and Technology, Ministry of Education, Northeast Normal University, Changchun 130024, China

MOE Joint Key Laboratory, Institute of Applied Physics and Materials Engineering and Department of Physics and Chemistry, Faculty of Science and Technology, University of Macau, Macao SAR 999078, P. R. China

School of Microelectronics, Dalian University of Technology, Dalian, 116024, China

Funding

National Natural Science Foundation of China · Universidade de Macau · Fundamental Research Funds for the Central Universities

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