期刊
PHYSICAL REVIEW B
卷 95, 期 3, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.95.035408
关键词
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资金
- National Key R D Program [2016YFA0301700]
- National Natural Science Foundation of China [11304301, 11575172, 61306150, 91421303]
- Strategic Priority Research Program (B) of the Chinese Academy of Sciences [XDB01030100]
- Fundamental Research Fund for the Central Universities
- U.S. Army Research Office [W911NF1210609, W911NF1410346]
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-Stuckelberg 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 explorations into various qubit encoding schemes in semiconductor nanostructures.
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