Dissipationless spin-valley current in zigzag-edge graphene ribbons with a net magnetization
- Authors
- Lee, Kyu Won; Lee, Cheol Eui
- Issue Date
- 16-5월-2017
- Publisher
- AMER PHYSICAL SOC
- Citation
- PHYSICAL REVIEW B, v.95, no.19
- Indexed
- SCIE
SCOPUS
- Journal Title
- PHYSICAL REVIEW B
- Volume
- 95
- Number
- 19
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/83446
- DOI
- 10.1103/PhysRevB.95.195132
- ISSN
- 2469-9950
- Abstract
- We have investigated the spin-valley degree of freedom characterized by the product of spin and valley indices in zigzag-edge graphene ribbons with a net magnetization by using a tight-binding model. We found that the CT invariance leads to the spin-valley current which is neither spin polarized nor valley polarized but fully spin-valley polarized, where C and T are the charge conjugation and the time-reversal operation, respectively. In the quantum Hall regime, the gapless edge states protected by the CPT invariance carry the spin-valley degree of freedom leading to a dissipationless spin-valley current, where P is the inversion operation.
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Collections - College of Science > Department of Physics > 1. Journal Articles
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