The electronic and topological properties of plumbene by first-principles calculations
ORAL
Abstract
Combining tight-binding (TB) models with first-principles calculations, we investigate the electronic and topological properties of plumbene. “Constructive” coupling effects of topological states are found in the plumbene, causing the system being a normal insulator, opposite to topologically nontrivial states formed in the other group IVA monolayers. Based on this mechanism, several schemes are raised to produce a globally topological state in the plumbene. Interestingly, after the edge modification in the nanoribbon structure, the plumbene can own low-dissipation tunable edge states with good conduction performance despite the topologically trivial behavior.
*This work was supported by the National Natural Science Foundation of China under Grants No. 11574051, No. 11874117, No. 11604134, and No. 11747137, and the Natural Science Foundation of Jiangsu Province (China) with Grants No. BK20170376. All the calculations were performed at the High Performance Computational Center (HPCC) of the Department of Physics at Fudan University.
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Presenters
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Yue Li
- Fudan Univ