Observation of Weak Anti-Localization and Electron-Electron Interaction on Few-Layer 1T'-MoTe2 Thin Films

摘要

Electronic transports of few-layer 1T'-MoTe2 films are measured at temperatures down to 0.26K.The lowtemperature 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 α ≈-0.5 and lφ ∝ T-0.5.The logarithmic temperature dependence has a positive slope κ ≈ 0.75,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.