Unusual Scaling of Kondo Spin Relaxation

22 Dec 2020  ·  Xingyu Shen, Yi Ji ·

The relation between the Kondo spin relaxation rate $ {\tau_{sK}}^{-1} $ and the Kondo momentum relaxation rate $ {\tau_{eK}}^{-1} $ is explored by using nonlocal spin valves with submicron copper channels that contain dilute iron impurities. A linear relation between $ {\tau_{sK}}^{-1} $ and $ {\tau_{eK}}^{-1} $ is established under varying temperatures. However, under varying impurity concentrations, ${\tau_{sK}}^{-1}$ remains nearly constant despite variation of $ {\tau_{eK}}^{-1} $ by a factor of 10. This surprising relation can be understood by considering spin relaxation through overlapping Kondo screening clouds and supports the physical existence of the elusive Kondo clouds.

PDF Abstract
No code implementations yet. Submit your code now


Mesoscale and Nanoscale Physics