Reversible Fermi Level Tuning of a Sb2Te3 Topological Insulator by Structural Deformation
| Autor: | Inwoong Hwang, Jimin Chae, Mann Ho Cho, Hyejin Choi, Kwangsik Jeong, Chul Kang, Myung-Ho Bae, Sang Han Park, Tae Hyeon Kim |
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| Rok vydání: | 2015 |
| Předmět: |
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 |
| Zdroj: | Nano Letters. 15:3820-3826 |
| ISSN: | 1530-6992 1530-6984 |
| DOI: | 10.1021/acs.nanolett.5b00553 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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