TY - JOUR
T1 - Dissipationless spin-valley current in zigzag-edge graphene ribbons with a net magnetization
AU - Lee, Kyu Won
AU - Lee, Cheol Eui
N1 - Funding Information:
This work was supported by the National Research Foundation of Korea (Projects No. 2016R1D1A1A09917003, No. 2016R1D1A1B03931144, No. 2015M1A7A1A01002234, and No. NRF-2010-0027963). K.W.L. gratefully acknowledges a Korea University research grant.
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.
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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 -