Spin-textures, Berry's phase and Quasiparticle Interference in Bi2Te3: A Topological Insulator with Warped Surface States

摘要

The energy-momentum relationship of electrons on the surface of an ideal"Hydrogen-Atom" Topological Insulator forms a cone - a Dirac cone, which, whenwarped and distorted (no longer described by the Dirac equation), can lead tounusual phenomena such as enhanced electronic interference around defects(observed in STM) and a magnetically ordered broken symmetry surface with losttopological protection. A detailed spin-texture and hexagonal warping maps onBi2Te3 are presented in this context as a Viewpoint on L.Fu, Phys. Rev. Lett.\textbf{103}, 266801 (2009).