Cotunneling spectroscopy in few-electron quantum dots -: art. no. 256801

被引：124
|
作者：
Zumbühl, DM
Marcus, CM
Hanson, MP
Gossard, AC
机构：
[1] Harvard Univ, Dept Phys, Cambridge, MA 02138 USA
[2] Univ Calif Santa Barbara, Dept Mat, Santa Barbara, CA 93106 USA
来源：
PHYSICAL REVIEW LETTERS | 2004年 / 93卷 / 25期
基金：
美国国家科学基金会;
关键词：
D O I：
10.1103/PhysRevLett.93.256801
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
Few-electron quantum dots are investigated in the regime of strong tunneling to the leads. Inelastic cotunneling is used to measure the two-electron singlet-triplet splitting above and below a magnetic field driven singlet-triplet transition. Evidence for a nonequilibrium two-electron singlet-triplet Kondo effect is presented. Cotunneling allows orbital correlations and parameters characterizing entanglement of the two-electron singlet ground state to be extracted from dc transport.
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页数：4
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