Experimental Observation of Topological Edge States at the Surface Step Edge of the Topological InsulatorZrTe5
| Autor: | Chao-Long Yang, Yu-Lei Chen, L. Sheng, Dingyu Xing, Xiang-Bing Li, Qi-Kun Xue, Bin-Bin Zhang, Shu-Hua Yao, Shao-Chun Li, Yang-Yang Lv, Jian Zhou, Wen-Kai Huang, Jin-Feng Jia, Kai-Wen Zhang, Ming-Hui Lu, Yan-Feng Chen |
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| Rok vydání: | 2016 |
| Předmět: |
Surface (mathematics)
Physics Band gap General Physics and Astronomy 02 engineering and technology Link (geometry) Edge (geometry) 021001 nanoscience & nanotechnology Topology 01 natural sciences law.invention Magnetic field law Topological insulator 0103 physical sciences Scanning tunneling microscope 010306 general physics 0210 nano-technology Topology (chemistry) |
| Zdroj: | Physical Review Letters. 116 |
| ISSN: | 1079-7114 0031-9007 |
| Popis: | We report an atomic-scale characterization of ${\mathrm{ZrTe}}_{5}$ by using scanning tunneling microscopy. We observe a bulk band gap of $\ensuremath{\sim}80\text{ }\text{ }\mathrm{meV}$ with topological edge states at the step edge and, thus, demonstrate that ${\mathrm{ZrTe}}_{5}$ is a two-dimensional topological insulator. We also find that an applied magnetic field induces an energetic splitting of the topological edge states, which can be attributed to a strong link between the topological edge states and bulk topology. The relatively large band gap makes ${\mathrm{ZrTe}}_{5}$ a potential candidate for future fundamental studies and device applications. |
| Databáze: | OpenAIRE |
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