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

Abstract

Abstract 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 ∼143 K and ∼36 K, respectively, and metal-to-insulator transitions at ∼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.