Study of physical properties of ternary topological insulators of Sb2SexTe3-x

• Main Authors: Chien-Cheng Chang, 張建誠
• Other Authors: Li-Wei Tu
• Format: Others
• Language: zh-TW
• Published: 2016
• Online Access: http://ndltd.ncl.edu.tw/handle/12500366655342617884

碩士 === 國立中山大學 === 物理學系研究所 === 104 === Topological insulator with its insulating interior is a novel material. The spin current on the surface of the material is not affected by the material defects and the collisions between particles which will produce current decay. Therefore, topological insulators can be used to control the spin current to achieve the vision of the quantum computer in the future. In this work, we investigate four Sb-based topological insulating materials of Sb2Te3, Sb2Se2Te, Sb2Te2Se, and Sb2Se3. We made a series of Raman spectroscopy and XRD experiment. We can measure vibration modes crystal by Raman spectroscopy、components measured by energy dispersive spectroscopy (EDS), and crystal structure by x-ray diffraction (XRD) experiments. From the above experiments, we can investigate the possible changes from topological insulator to non-topological insulator. We can closely understand the topological insulator material and spintronics.