Evolution of the Electronic Structure of MoTe2 under Pressure

Transition metal dichalcogenides have recently been heavily studied owing to their intriguing physical properties such as extremely large magnetoresistance (MR) in WTe₂ and MoTe₂. Further interests are attracted when they are predicted as candidates of type-II Weyl semimetals. Moreover, as both WTe₂ and MoTe₂ host superconductivity, this opens up the possibility of topological superconductivity.
In this work, we present the magneto-electronic transport study of MoTe₂ under pressure. We did the magneto-resistance measurement with magnetic field up to 14 T and temperature down to 30 mK. The large MR and the Hall coefficient decrease rapidly with increasing pressure. Beyond 10 kbar, where the T_d phase is completely suppressed and the superconducting transition temperature T_c is significantly enhanced, the Hall coefficient becomes very small and saturated. We will discuss the evolution of Fermi surface across the temperature-pressure phase diagram. The electronic structure study would help us investigate the ground state and superconductivity of MoTe₂.