Nonequilibrium transport through a Kondo-dot in a magnetic field

被引：2
|
作者：
Wölfle, P [1 ]
Rosch, A [1 ]
Paaske, J [1 ]
Kroha, J [1 ]
机构：
[1] Univ Karlsruhe, Inst Theorie Kondensierten Materie, D-76128 Karlsruhe, Germany
来源：
ADVANCES IN SOLID STATE PHYSICS 42 | 2002年 / 42卷
关键词：
D O I：
10.1007/3-540-45618-X_14
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
Electron transport through a quantum-dot in the Coulomb blockade regime is modeled by a Kondo-type hamiltonian describing spin-dependent tunneling and exchange interaction with the local spin. We consider the regime of large transport voltage V and magnetic field B with max(V, B) much greater than T-K, the Kondo temperature, and show that a renormalized perturbation theory call be formulated describing the local magnetization M and the differential conductance G quantitatively. Based on the structure of leading logarithmic corrections ill bare perturbation theory we argue that the perturbative renormalization group has to be generalized to allow for frequency dependent coupling functions. We simplify the full RG equations in the spirit of poor man's scaling and calculate All and G in leading order of 1/ln[(V, B)Tk].
引用
收藏
页码：175 / 185
页数：11
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