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arXiv · 1610.04940

Spin blockade and coherent dynamics of high-spin states in a three-electron double quantum dot

Bao-Bao Chen·Bao-Chuan Wang·Gang Cao·Hai-Ou Li·Ming Xiao·Guang-Can Guo·Hong-Wen Jiang·Xuedong Hu·Guo-Ping Guo
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Abstract

Asymmetry in a three-electron double quantum dot (DQD) allows spin blockade, when spin-3/2 (quadruplet) states and spin-1/2 (doublet) states have different charge configurations. We have observed this DQD spin blockade near the (1,2)-(2,1) charge transition using a pulsed-gate technique and a charge sensor. We then use this spin blockade to detect Landau-Zener-St\"uckelberg (LZS) interference and coherent oscillations between the spin quadruplet and doublet states. Such studies add to our understandings of coherence and control properties of three-spin states in a double dot, which in turn would benefit the explorations into various qubit encoding schemes in semiconductor nanostructures.

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Bao-Bao Chen, Bao-Chuan Wang, Gang Cao, Hai-Ou Li, Ming Xiao, Guang-Can Guo, Hong-Wen Jiang, Xuedong Hu, Guo-Ping Guo. 2016-10-17. Spin blockade and coherent dynamics of high-spin states in a three-electron double quantum dot. https://doi.org/10.1103/physrevb.95.035408

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