Conductance via the multiorbital Kondo effect in single quantum dots
Conductance via the multiorbital Kondo effect in single quantum dots
复制标题
通过单量子点中的多轨道近藤效应实现电导
DOI:
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发表时间:
2006
期刊:
影响因子:
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通讯作者:
N. Kawakami
中科院分区:
文献类型:
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作者:
R. Sakano;N. Kawakami
We study the Kondo effect in a single quantum dot system with two or three orbitals by using the Bethe-ansatz exact solution at zero temperature and the non-crossing approximation at finite temperatures. For the two-orbital Kondo effect, the conductance is shown to be constant at absolute zero in any magnetic fields, but decrease monotonically with increasing fields at finite temperatures. In the case with more orbitals, the conductance increases at absolute zero, while it features a maximum structure as a function of the magnetic field at finite temperatures. We discuss how these characteristic transport properties come from the multi orbital Kondo effect in magnetic fields.