Chen Jiancui, Zhou Zhang, Liu Hongtao, Bian Ce, Zou Yuting, Wang Zhenyu, Zhao Zhen, Wu Kang, Yang Haitao, Shen Chengmin, Cheng Zhi Gang, Bao Lihong, Gao Hong-Jun
Institute of Physics, Chinese Academy of Sciences, PO Box 603, Beijing 100190, People's Republic of China.
University of Chinese Academy of Sciences and CAS Center for Excellence in Topological Quantum Computation, Chinese Academy of Sciences, PO Box 603, Beijing 100190, People's Republic of China.
J Phys Condens Matter. 2021 Apr 23;33(18). doi: 10.1088/1361-648X/abef99.
We present a chemical vapor deposition method for the synthesizing of single-crystal 1T'-MoTenanowires and the observation of one-dimensional weak antilocalization effect in 1T'-MoTenanowires for the first time. The diameters of the 1T'-MoTenanowires can be controlled by changing the flux of H/Ar carrier gas. Spherical-aberration-corrected transmission electron microscopy, selected area electron diffraction and energy dispersive x-ray spectroscopy (EDS) reveal the 1T' phase and the atomic ratio of Te/Mo closing to 2:1. The resistivity of 1T'-MoTenanowires shows metallic behavior and agrees well with the Fermi liquid theory (<20 K). The coherence length extracted from 1D Hikami-Larkin-Nagaoka model with the presence of strong spin-orbit coupling is proportional to, indicating a Nyquist electron-electron interaction dephasing mechanism at one dimension. These results provide a feasible way to prepare one-dimensional topological materials and is promising for fundamental study of the transport properties.
我们首次提出了一种用于合成单晶1T'-MoTe纳米线的化学气相沉积方法,并对1T'-MoTe纳米线中的一维弱反局域化效应进行了观察。1T'-MoTe纳米线的直径可以通过改变H/Ar载气的流量来控制。球差校正透射电子显微镜、选区电子衍射和能量色散X射线光谱(EDS)揭示了1T'相以及Te/Mo的原子比接近2:1。1T'-MoTe纳米线的电阻率表现出金属行为,并且与费米液体理论(<20 K)吻合良好。从存在强自旋轨道耦合的一维日高-拉金-永冈模型中提取的相干长度与……成正比,表明在一维中存在奈奎斯特电子-电子相互作用退相干机制。这些结果为制备一维拓扑材料提供了一种可行的方法,并且在输运性质的基础研究方面具有广阔前景。