Thermopower of a Kondo spin-correlated quantum dot

被引：210
作者：
Scheibner, R [1 ]
Buhmann, H
Reuter, D
Kiselev, MN
Molenkamp, LW
机构：
[1] Univ Wurzburg, Phys Inst EP3, D-97074 Wurzburg, Germany
[2] Univ Wurzburg, Inst Theoret Phys, D-97074 Wurzburg, Germany
[3] Ruhr Univ Bochum, Lehrstuhl Festkorperphys, D-44801 Bochum, Germany
来源：
PHYSICAL REVIEW LETTERS | 2005年 / 95卷 / 17期
关键词：
D O I：
10.1103/PhysRevLett.95.176602
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
The thermopower of a Kondo-correlated gate-defined quantum dot is studied using a current heating technique. In the presence of spin correlations, the thermopower shows a clear deviation from the semiclassical Mott relation between thermopower and conductivity. The strong thermopower signal indicates a significant asymmetry in the spectral density of states of the Kondo resonance with respect to the Fermi energies of the reservoirs. The observed behavior can be explained within the framework of an Anderson-impurity model.
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页数：4
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