期刊
PHYSICAL REVIEW B
卷 94, 期 14, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.94.140401
关键词
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资金
- MEXT KAKENHI [26103003, 15H01014]
- JSPS KAKENHI [25246020, 16H02333, 26289229]
- JSPS
- Grants-in-Aid for Scientific Research [16H02333, 26289229, 15H01014, 26103003] Funding Source: KAKEN
We study the effect of a pure spin current on the Kondo singlet in a dilutedmagnetic alloy using nonlocal lateral spin valve structures with highly spin polarized Co2FeSi electrodes. Temperature dependence of the nonlocal 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 increasing 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.
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