Spin-state mixing in InAs double quantum dots

被引：58
|
作者：
Pfund, A. [1 ]
Shorubalko, I. [1 ]
Ensslin, K. [1 ]
Leturcq, R. [1 ]
机构：
[1] ETH, Solid State Phys Lab, CH-8093 Zurich, Switzerland
来源：
PHYSICAL REVIEW B | 2007年 / 76卷 / 16期
关键词：
D O I：
10.1103/PhysRevB.76.161308
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We quantify the contributions of hyperfine and spin-orbit-mediated singlet-triplet mixing in weakly coupled InAs quantum dots by electron transport spectroscopy in the Pauli spin-blockade regime. In contrast to double dots in GaAs, the spin-orbit coupling is found to be more than two orders of magnitudes larger than the hyperfine mixing energy. It is already effective at magnetic fields of a few mT, where deviations from pure hyperfine mixing are observed.
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页数：4
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