Spin echo of a single electron spin in a quantum dot

被引：176

作者：

Koppens, F. H. L. ^{[1
]}

Nowack, K. C. ^{[1
]}

Vandersypen, L. M. K. ^{[1
]}

机构：

[1] Kavli Inst NanoScience Delft, NL-2600 GA Delft, Netherlands

来源：

PHYSICAL REVIEW LETTERS | 2008年 / 100卷 / 23期

关键词：

Semiconductor quantum dots;

D O I：

10.1103/PhysRevLett.100.236802

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report a measurement of the spin-echo decay of a single electron spin confined in a semiconductor quantum dot. When we tip the spin in the transverse plane via a magnetic field burst, it dephases in 37 ns due to the Larmor precession around a random effective field from the nuclear spins in the host material. We reverse this dephasing to a large extent via a spin-echo pulse, and find a spin-echo decay time of about 0.5 mu s at 70 mT. These results are in the range of theoretical predictions of the electron spin coherence time governed by the electron-nuclear dynamics.

引用

页数：4

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