1. Reversible Fermi Level Tuning of a Sb2Te3 Topological Insulator by Structural Deformation
- Author
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Inwoong Hwang, Jimin Chae, Mann Ho Cho, Hyejin Choi, Kwangsik Jeong, Chul Kang, Myung-Ho Bae, Sang Han Park, and Tae Hyeon Kim
- Subjects
Surface (mathematics) ,Materials science ,Condensed matter physics ,Scattering ,Mechanical Engineering ,Fermi level ,Bioengineering ,General Chemistry ,Condensed Matter Physics ,symbols.namesake ,Topological insulator ,Transmittance ,symbols ,Topological order ,General Materials Science ,Density functional theory ,Spectroscopy - Abstract
For three-dimensional (3D) topological insulators that have a layered structure, strain was used to control critical physical properties. Here, we show that tensile strain decreases bulk carrier density while accentuating transport of topological surface state using temperature-dependent resistance and magneto-resistance measurements, terahertz-time domain spectroscopy and density functional theory calculations. The induced strain was confirmed by transmittance X-ray scattering measurements. The results show the possibility of reversible topological surface state device control using structural deformation.
- Published
- 2015