Observation of Weak Anti-Localization and Electron-Electron Interaction on Few-Layer 1T'-MoTe_2 Thin Films

Electronic transports of few-layer 1T'-MoTe_2 films are measured at temperatures down to 0.26 K. The low-temperature conductivity exhibits logarithmic temperature dependence and negative magneto response. The negative magnetoconductivity can be well fitted by the two-dimensional weak anti-localization theory taking a single channel of electrons into account, with the parameters \alpha\approx -0.5 and l_\phi \propto T^-0.5. The logarithmic temperature dependence has a positive slope \kappa\approx0.75, indicating the dominance of electron-electron interaction over the weak anti-localization effect, with an apparently negative Coulomb screening factor F that demands future work for clarification.