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Conductance through a multiorbital quantum dot coupled to ferromagnetic leads

✍ Scribed by Masato Tsuji; Sei-ichiro Suga

Publisher
Elsevier Science
Year
2007
Tongue
English
Weight
240 KB
Volume
40
Category
Article
ISSN
1386-9477

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✦ Synopsis

We investigate the Kondo effect of a multiorbital quantum dot coupled to spin polarized leads, using the noncrossing approximation. It is shown that as the spin polarization is increased, the Kondo peak splits into three peaks and the middle one is located close to the Fermi energy. The results indicate that the Kondo effect caused by the orbital degrees of freedom survives, while the Kondo effect by the spin degrees of freedom is suppressed. In the temperature dependence of the conductance, the hump structure emerges owing to the contribution from the orbital and spin degrees of freedom.

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