Spin pumping through magnetic impurity effect
Deng Wei-Yina)†, Sheng Lia),b), Xing Ding-Yu, 邢 定钰a),b)
       
Schematics of a one-dimensional spin pump, showing that there exists a magnetic impurity between two parts. The oscillating potential U ( t ) is made by a microscope probe above the impurity with vertical up-and-down movement. The oscillating voltage V ( t ) is applied by a metal gate.