论文标题
由表面科学方法探测的强和弱的三维拓扑绝缘子
Strong and Weak Three-Dimensional Topological Insulators Probed by Surface Science Methods
论文作者
论文摘要
我们回顾了表面科学方法发现和改善3D拓扑绝缘材料的贡献，同时以我们自己的工作为例。特别是，我们证明了自旋偏置的角度分辨光电子光谱对于证明自旋螺旋表面狄拉克锥有助于将其DIRAC点的能量调整为Fermi水平，并发现新型的拓扑绝缘子（如双重绝缘体），例如双重的，或相变材料中的可切换材料。此外，我们引入了通过扫描隧道光谱法并确定弱拓扑绝缘子中的拓扑边缘状态，从而介绍了空间绘制潜在波动的程序。
We review the contributions of surface science methods to discover and improve 3D topological insulator materials, while illustrating with examples from our own work. In particular, we demonstrate that spin-polarized angular-resolved photoelectron spectroscopy is instrumental to evidence the spin-helical surface Dirac cone, to tune its Dirac point energy towards the Fermi level, and to discover novel types of topological insulators such as dual ones or switchable ones in phase change materials. Moreover, we introduce procedures to spatially map potential fluctuations by scanning tunneling spectroscopy and to identify topological edge states in weak topological insulators.
