TY - JOUR
T1 - Gate-Tunable Spin-Charge Conversion and the Role of Spin-Orbit Interaction in Graphene
AU - Dushenko, S.
AU - Ago, H.
AU - Kawahara, K.
AU - Tsuda, T.
AU - Kuwabata, S.
AU - Takenobu, T.
AU - Shinjo, T.
AU - Ando, Y.
AU - Shiraishi, M.
N1 - Publisher Copyright:
© 2016 American Physical Society.
PY - 2016/4/21
Y1 - 2016/4/21
N2 - The small spin-orbit interaction of carbon atoms in graphene promises a long spin diffusion length and the potential to create a spin field-effect transistor. However, for this reason, graphene was largely overlooked as a possible spin-charge conversion material. We report electric gate tuning of the spin-charge conversion voltage signal in single-layer graphene. Using spin pumping from an yttrium iron garnet ferrimagnetic insulator and ionic liquid top gate, we determined that the inverse spin Hall effect is the dominant spin-charge conversion mechanism in single-layer graphene. From the gate dependence of the electromotive force we showed the dominance of the intrinsic over Rashba spin-orbit interaction, a long-standing question in graphene research.
AB - The small spin-orbit interaction of carbon atoms in graphene promises a long spin diffusion length and the potential to create a spin field-effect transistor. However, for this reason, graphene was largely overlooked as a possible spin-charge conversion material. We report electric gate tuning of the spin-charge conversion voltage signal in single-layer graphene. Using spin pumping from an yttrium iron garnet ferrimagnetic insulator and ionic liquid top gate, we determined that the inverse spin Hall effect is the dominant spin-charge conversion mechanism in single-layer graphene. From the gate dependence of the electromotive force we showed the dominance of the intrinsic over Rashba spin-orbit interaction, a long-standing question in graphene research.
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U2 - 10.1103/PhysRevLett.116.166102
DO - 10.1103/PhysRevLett.116.166102
M3 - Article
AN - SCOPUS:84964303779
VL - 116
JO - Physical Review Letters
JF - Physical Review Letters
SN - 0031-9007
IS - 16
M1 - 166102
ER -