Chiral charge pumping in graphene deposited on a magnetic insulator
Journal article, 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.

films

ferromagnetic metal

magnons

Author

M. Evelt

University of Münster

H. Ochoa

University of California

O. Dzyapko

University of Münster

V. E. Demidov

University of Münster

Avgust Yurgens

Chalmers, Microtechnology and Nanoscience (MC2), Quantum Device Physics

Jie Sun

Chalmers, Microtechnology and Nanoscience (MC2), Quantum Device Physics

Y. Tserkovnyak

University of California

V. Bessonov

Russian Academy of Sciences

A. B. Rinkevich

Russian Academy of Sciences

S. O. Demokritov

Russian Academy of Sciences

University of Münster

Physical Review B

24699950 (ISSN) 24699969 (eISSN)

Vol. 95 2 Article number 024408- 024408

Areas of Advance

Information and Communication Technology

Nanoscience and Nanotechnology

Driving Forces

Sustainable development

Subject Categories

Physical Sciences

Nano Technology

Roots

Basic sciences

Infrastructure

Nanofabrication Laboratory

DOI

10.1103/PhysRevB.95.024408

More information

Latest update

4/16/2018