Observation of Weak Anti-Localization and Electron-Electron Interaction on Few-Layer 1T$'$-MoTe$_2$ Thin Films
Qin Wang1,3, Peng Yu2, Xiangwei Huang1,3, Jie Fan1, Xiunian Jing1,4, Zhongqing Ji1, Zheng Liu2**, Guangtong Liu1**, Changli Yang1,4**, Li Lu1,4
1Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190 2School of Materials Science and Engineering, Nanyang Technological University, Singapore 639798, Singapore 3University of Chinese Academy of Sciences, Beijing 100049 4Collaborative Innovation Center of Quantum Matter, Beijing 100871
Abstract：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.
2018, Vol. 35 
