Direct Evidence for Suppression of the Kondo Effect due to Pure Spin Current

Abstract

We study the effect of a pure spin current on the Kondo singlet in a diluted magnetic alloy using non-local lateral spin valve structures with highly spin polarized Co2FeSi electrodes. Temperature dependence of the non-local spin signals shows a sharp reduction with decreasing temperature, followed by a plateau corresponding to the low temperature Fermi liquid regime below the Kondo temperature (TK). The spin diffusion length of the Kondo alloy is found to increase with the evolution of spin accumulation. The results are in agreement with the intuitive description that the Kondo singlet cannot survive any more in sufficiently large spin accumulation even below TK.

5 pages, 4 figures

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Cited by in corpus (5)

• Theory of Kondo suppression of spin polarization in nonlocal spin valves
• Nonequilibrium Kondo effect by equilibrium numerical renormalization group method: The hybrid Anderson model subject to a finite spin bias
• Investigation of spin scattering mechanism in silicon channels of Fe/MgO/Si lateral spin valves
• Detection of the interfacial exchange field at a ferromagnetic insulator-nonmagnetic metal interface with pure spin currents
• Unusual Scaling of Kondo Spin Relaxation