Topological insulator nanostructures： Materials synthesis, Raman spectroscopy, and transport properties

• Published in: Frontiers of physics Vol. 7; no. 2; pp. 208 - 217
• Main Author: 李辉 彭海琳 党文辉 余力立 刘忠范
• Format: Journal Article
• Language: English
• Published: Heidelberg Higher Education Press 01.04.2012; SP Higher Education Press; Springer Nature B.V
• Subjects: Astronomy; Astrophysics and Cosmology; Atomic; Bi2Te3; Bismuth tellurides; Condensed Matter Physics; Energy dissipation; Molecular; Nanoribbons; Nanostructure; Nanowires; Optical and Plasma Physics; Particle and Nuclear Physics; Physical properties; Physics; Physics and Astronomy; Quantum computing; Raman; Raman spectra; Raman spectroscopy; Review Article; Spectrum analysis; Spintronics; Structural analysis; surface state manipulation; Synthesis; Thin films; topological insulator; Topological insulators; transport; Transport properties; 拉曼光谱; 控制合成; 纳米材料; 结构拓扑; 绝缘体材料; 自旋电子学; 输运性质; topological insulator; synthesis; nanostructure; Raman; surface state manipulation; transport
• ISSN: 2095-0462; 2095-0470
• DOI: 10.1007/s11467-011-0199-7

Nanostructured topological insulator materials such as ultrathin films, nanoplates, nanowires, and nanoribbons are attracting much attention for fundamental research as well as potential applications in low-energy dissipation electronics, spintronics, thermoelectrics, magnetoelectrics, and quantum computing due to their extremely large surface-to-volume ratios and exotic metallic edge/surface states. Layered Bi2Se3 and Bi2Te3 serve as reference topological insulator materials with a large nontrivial bulk gap up to 0.3 eV （equivalent to 3600 K） and simple single-Dirac-cone surface states. In this mini-review, we present an overview of recent advances in nanostructured topological in- sulator Bi2Se3 and Bi3Te3 from the viewpoints of controlled synthesis and physical properties. We summarize our recent achievements in the vapor-phase synthesis and structural characteriza- tion of nanostructured topological insulator Bi2Se3 and Bi2Te3, such as nanoribbons and ultrathin nanoplates. We also demonstrate the evolution of Raman spectra with the number of few-layer topo- logical insulators, as well as the transport measurements that have succeeded in accessing the surface conductance and surface state manipulations in the device of topological insulator nanostructures.