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arXiv · 0912.5046

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

M. Z. Hasan·H. Lin·A. Bansil
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Abstract

The energy-momentum relationship of electrons on the surface of an ideal "Hydrogen-Atom" Topological Insulator forms a cone - a Dirac cone, which, when warped and distorted (no longer described by the Dirac equation), can lead to unusual phenomena such as enhanced electronic interference around defects (observed in STM) and a magnetically ordered broken symmetry surface with lost topological protection. A detailed spin-texture and hexagonal warping maps on Bi2Te3 are presented in this context as a Viewpoint on L.Fu, Phys. Rev. Lett. \textbf{103}, 266801 (2009).

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M. Z. Hasan, H. Lin, A. Bansil. 2009-12-27. Spin-textures, Berry's phase and Quasiparticle Interference in Bi2Te3: A Topological Insulator with Warped Surface States. https://doi.org/10.1103/physics.2.108

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