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Spin current at a magnetic junction as a probe of the Kondo state

Yamamoto, Tsuyoshi*; Kato, Takeo*; Matsuo, Mamoru

We investigate the spin Seebeck effect and spin pumping in a junction between a ferromagnetic insulator and a magnetic impurity deposited on a normal metal. By performing a numerical renormalization group calculation, we show that spin current is enhanced by the Kondo effect. This spin current is suppressed by an increase in temperature or a magnetic field comparable to the Kondo temperature. Our results indicate that spin transport can be a direct probe of spin excitation in strongly correlated systems.

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Category:Materials Science, Multidisciplinary

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