Large-Area Freestanding Weyl Semimetal WTe_2 Membranes

Yequan Chen; Ruxin Liu; Yongda Chen; Xiao Yuan; Jiai Ning; Chunchen Zhang; Liming Chen; Peng Wang; Liang He; Rong Zhang; Yongbing Xu; Xuefeng Wang

doi:10.1088/0256-307X/38/1/017101

Large-Area Freestanding Weyl Semimetal WTe $_{2}$ Membranes

¹Jiangsu Provincial Key Laboratory of Advanced Photonic and Electronic Materials, School of Electronic Science and Engineering, and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China
²College of Engineering and Applied Sciences, Nanjing University, Nanjing 210093, China

Funds: Supported by the National Key R&D Program of China (Grant No. 2017YFA0206304), the National Natural Science Foundation of China (Grant Nos. 11874203, 61822403, U1732159, 11774160, and 61427812), and the Fundamental Research Funds for the Central Universities (Grant No. 021014380080).

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Received Date: November 01, 2020

Published Date: December 31, 2020

Abstract

Abstract

We report a universal transfer methodology for producing artificial heterostructures of large-area freestanding single-crystalline WTe $_{2}$ membranes on diverse target substrates. The transferred WTe $_{2}$ membranes exhibit a nondestructive structure with a carrier mobility comparable to that of as-grown films ( $\sim$ 179–1055 cm $^{2}$ $\cdot$ V $^{-1}$ $\cdot$ s $^{-1}$ ). Furthermore, the transferred membranes show distinct Shubnikov–de Haas quantum oscillations as well as weak localization/weak anti-localization. These results provide a new approach to the development of atom manufacturing and devices based on atomic-level, large-area topological quantum films.

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