Large-Area Freestanding Weyl Semimetal WTe2 MembranesSupported 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).

Abstract

We report a universal transfer methodology for producing artificial heterostructures of large-area freestanding single-crystalline WTe2 membranes on diverse target substrates. The transferred WTe2 membranes exhibit a nondestructive structure with a carrier mobility comparable to that of as-grown films (∼ 179–1055 cm2 · V−1 · 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.