Chiral charge pumping in graphene deposited on a magnetic insulator
Artikel i vetenskaplig tidskrift, 2017
We demonstrate experimentally that a sizable chiral charge pumping can be achieved at room temperature in graphene/yttrium iron garnet (YIG) bilayer systems. The effect, which cannot be attributed to the ordinary spin pumping, reveals itself in the creation of a dc electric field/voltage in graphene as a response to the dynamic magnetic excitations (spin waves) in an adjacent out-of-plane magnetized YIG film. We show that the induced voltage changes its sign when the orientation of the static magnetization is reversed, clearly indicating the broken mirror reflection symmetry about the planes normal to the graphene/YIG interface. The strength of effect shows a nonmonotonous dependence on the spin-wave frequency, in agreement with the proposed theoretical model.
magnons
ferromagnetic metal
films
Författare
M. Evelt
Westfaelische Wilhelms-Universität Münster
H. Ochoa
University of California, Los Angeles
O. Dzyapko
Westfaelische Wilhelms-Universität Münster
V. E. Demidov
Westfaelische Wilhelms-Universität Münster
Avgust Yurgens
Chalmers, Mikroteknologi och nanovetenskap (MC2), Kvantkomponentfysik
Jie Sun
Chalmers, Mikroteknologi och nanovetenskap (MC2), Kvantkomponentfysik
Y. Tserkovnyak
University of California, Los Angeles
V. Bessonov
M.N. Mikheev Institute of Metal Physics of the Ural Branch of the Russian Academy of Sciences
A. B. Rinkevich
M.N. Mikheev Institute of Metal Physics of the Ural Branch of the Russian Academy of Sciences
S. O. Demokritov
M.N. Mikheev Institute of Metal Physics of the Ural Branch of the Russian Academy of Sciences
Westfaelische Wilhelms-Universität Münster
Physical Review B
24699950 (ISSN) 24699969 (eISSN)
Vol. 95 2 Article number 024408- 024408Styrkeområden
Informations- och kommunikationsteknik
Nanovetenskap och nanoteknik
Drivkrafter
Hållbar utveckling
Ämneskategorier (SSIF 2011)
Fysik
Nanoteknik
Fundament
Grundläggande vetenskaper
Infrastruktur
Nanotekniklaboratoriet
DOI
10.1103/PhysRevB.95.024408