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.
| Original language | English |
|---|---|
| Article number | 195132 |
| Journal | Physical Review B |
| Volume | 95 |
| Issue number | 19 |
| DOIs | |
| Publication status | Published - 2017 May 16 |
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ASJC Scopus subject areas
- Condensed Matter Physics
Cite this
Dissipationless spin-valley current in zigzag-edge graphene ribbons with a net magnetization. / Lee, Kyu Won; Lee, Cheol Eui.
In: Physical Review B, Vol. 95, No. 19, 195132, 16.05.2017.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Dissipationless spin-valley current in zigzag-edge graphene ribbons with a net magnetization
AU - Lee, Kyu Won
AU - Lee, Cheol Eui
PY - 2017/5/16
Y1 - 2017/5/16
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=85023647051&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85023647051&partnerID=8YFLogxK
U2 - 10.1103/PhysRevB.95.195132
DO - 10.1103/PhysRevB.95.195132
M3 - Article
AN - SCOPUS:85023647051
VL - 95
JO - Physical Review B-Condensed Matter
JF - Physical Review B-Condensed Matter
SN - 1098-0121
IS - 19
M1 - 195132
ER -