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, and Guo-Ping Guo
Phys. Rev. B 95, 035408 – Published 10 January 2017
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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-Stückelberg 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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  • Received 21 September 2016

DOI:https://doi.org/10.1103/PhysRevB.95.035408

©2017 American Physical Society

Physics Subject Headings (PhySH)

  1. Physical Systems
Condensed Matter, Materials & Applied Physics

Authors & Affiliations

Bao-Bao Chen1,2, Bao-Chuan Wang1,2, Gang Cao1,2,*, Hai-Ou Li1,2, Ming Xiao1,2, Guang-Can Guo1,2, Hong-Wen Jiang3, Xuedong Hu4, and Guo-Ping Guo1,2,*

  • 1Key Laboratory of Quantum Information, University of Science and Technology of China, Chinese Academy of Sciences, Hefei 230026, China
  • 2Synergetic Innovation Center of Quantum Information & Quantum Physics, University of Science and Technology of China, Hefei 230026, China
  • 3Department of Physics and Astronomy, University of California, Los Angeles, California 90095, USA
  • 4Department of Physics, University at Buffalo, State University of New York, Buffalo, New York 14260, USA

  • *Corresponding authors: gcao@ustc.edu.cn; gpguo@ustc.edu.cn

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Issue

Vol. 95, Iss. 3 — 15 January 2017

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