Insulator-to-metal transition in 2H-MoTe2 flakes

Exploration of the phase transition is one of the hottest topics in condensed matter physics. In this paper, we have fabricated 2H-MoTe2 devices and investigated their magnetotransport properties. As temperature decreases, the 2H-MoTe2 flake undergoes several metal-insulator transitions, including insulator-to-metal transitions at similar to 143 K and similar to 36 K, respectively, and metal-to-insulator transitions at similar to 109 K. In addition, these transitions are not affected by the application of external magnetic fields. The possible physical mechanisms behind these intriguing transitions originate from the electron-phonon coupling and the impurity scattering in the 2H-MoTe2 flakes.