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Topological kink states in graphene
Zibo Wang1,2, Shuguang Cheng3, Xiao Liu4
1College of Physics and Electronic Engineering, Sichuan Normal University, Chengdu 610068, People's Republic of China.
Nanotechnology
|June 23, 2021
Summary
Topological kink states in graphene offer unique valley-polarized properties. This review covers theoretical and experimental advances in graphene systems and their applications in valleytronics.
Area of Science:
- Condensed Matter Physics
- Materials Science
- Quantum Mechanics
Background:
- Graphene's unique band structure leads to exotic electronic properties.
- Topological kink states emerge at domain walls due to broken inversion symmetry, opening a bulk energy gap.
- Valley-momentum locking in these states is crucial for valleytronics.
Purpose of the Study:
- To systematically review theoretical and experimental progress on topological kink states in graphene.
- To introduce diverse applications of these topological states.
Main Methods:
- Theoretical modeling of topological kink states in graphene.
- Experimental investigations of topological kink states in graphene systems.
- Analysis of graphene-like classical wave systems exhibiting similar phenomena.
Main Results:
- Existence of one-dimensional valley-polarized topological kink states in graphene.
- Demonstration of bulk energy gap opening due to inversion symmetry breaking.
- Observation of valley-momentum locking in topological kink states.
Conclusions:
- Topological kink states in graphene are a significant area of research with potential for advanced electronic devices.
- The review highlights the versatility of these states for applications like valley filters and current manipulation.
- Future research directions include exploring Majorana zero modes and further applications in valleytronics.
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