skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Vanishing current hysteresis under competing nuclear spin pumping processes in a quadruplet spin-blockaded double quantum dot

Abstract

We investigate nuclear spin pumping with five-electron quadruplet spin states in a spin-blockaded weakly coupled vertical double quantum dot device. Two types of hysteretic steps in the leakage current are observed on sweeping the magnetic field and are associated with bidirectional polarization of nuclear spin. Properties of the steps are understood in terms of bias-voltage-dependent conditions for the mixing of quadruplet and doublet spin states by the hyperfine interaction. The hysteretic steps vanish when up- and down-nuclear spin pumping processes are in close competition.

Authors:
 [1];  [1]; ;  [2]
  1. Quantum Spin Information Project, Japan Science and Technology Agency, ICORP, 3-1, Morinosato Wakamiya, Atsugi-shi, Kanagawa 243-0198 (Japan)
  2. National Research Council of Canada, M50, Montreal Road, Ottawa, Ontario K1A 0R6 (Canada)
Publication Date:
OSTI Identifier:
22398964
Resource Type:
Journal Article
Journal Name:
Applied Physics Letters
Additional Journal Information:
Journal Volume: 106; Journal Issue: 17; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0003-6951
Country of Publication:
United States
Language:
English
Subject:
77 NANOSCIENCE AND NANOTECHNOLOGY; ELECTRIC POTENTIAL; ELECTRONS; HYPERFINE STRUCTURE; HYSTERESIS; LEAKAGE CURRENT; MAGNETIC FIELDS; POLARIZATION; PUMPING; QUANTUM DOTS; SPIN

Citation Formats

Amaha, S., E-mail: s-amaha@riken.jp, Quantum Functional System Research Group, RIKEN Center for Emergent Matter Science, RIKEN, 3-1 Wako-shi, Saitama 351-0198, Hatano, T., Department of Physics, Tohoku University, Sendai-shi, Miyagi 980-8578, Tarucha, S., Quantum Functional System Research Group, RIKEN Center for Emergent Matter Science, RIKEN, 3-1 Wako-shi, Saitama 351-0198, Department of Applied Physics, School of Engineering, University of Tokyo, 7-3-1, Hongo, Bunkyo-ku, Tokyo 113-8656, Gupta, J. A., and Austing, D. G. Vanishing current hysteresis under competing nuclear spin pumping processes in a quadruplet spin-blockaded double quantum dot. United States: N. p., 2015. Web. doi:10.1063/1.4919101.
Amaha, S., E-mail: s-amaha@riken.jp, Quantum Functional System Research Group, RIKEN Center for Emergent Matter Science, RIKEN, 3-1 Wako-shi, Saitama 351-0198, Hatano, T., Department of Physics, Tohoku University, Sendai-shi, Miyagi 980-8578, Tarucha, S., Quantum Functional System Research Group, RIKEN Center for Emergent Matter Science, RIKEN, 3-1 Wako-shi, Saitama 351-0198, Department of Applied Physics, School of Engineering, University of Tokyo, 7-3-1, Hongo, Bunkyo-ku, Tokyo 113-8656, Gupta, J. A., & Austing, D. G. Vanishing current hysteresis under competing nuclear spin pumping processes in a quadruplet spin-blockaded double quantum dot. United States. https://doi.org/10.1063/1.4919101
Amaha, S., E-mail: s-amaha@riken.jp, Quantum Functional System Research Group, RIKEN Center for Emergent Matter Science, RIKEN, 3-1 Wako-shi, Saitama 351-0198, Hatano, T., Department of Physics, Tohoku University, Sendai-shi, Miyagi 980-8578, Tarucha, S., Quantum Functional System Research Group, RIKEN Center for Emergent Matter Science, RIKEN, 3-1 Wako-shi, Saitama 351-0198, Department of Applied Physics, School of Engineering, University of Tokyo, 7-3-1, Hongo, Bunkyo-ku, Tokyo 113-8656, Gupta, J. A., and Austing, D. G. 2015. "Vanishing current hysteresis under competing nuclear spin pumping processes in a quadruplet spin-blockaded double quantum dot". United States. https://doi.org/10.1063/1.4919101.
@article{osti_22398964,
title = {Vanishing current hysteresis under competing nuclear spin pumping processes in a quadruplet spin-blockaded double quantum dot},
author = {Amaha, S., E-mail: s-amaha@riken.jp and Quantum Functional System Research Group, RIKEN Center for Emergent Matter Science, RIKEN, 3-1 Wako-shi, Saitama 351-0198 and Hatano, T. and Department of Physics, Tohoku University, Sendai-shi, Miyagi 980-8578 and Tarucha, S. and Quantum Functional System Research Group, RIKEN Center for Emergent Matter Science, RIKEN, 3-1 Wako-shi, Saitama 351-0198 and Department of Applied Physics, School of Engineering, University of Tokyo, 7-3-1, Hongo, Bunkyo-ku, Tokyo 113-8656 and Gupta, J. A. and Austing, D. G.},
abstractNote = {We investigate nuclear spin pumping with five-electron quadruplet spin states in a spin-blockaded weakly coupled vertical double quantum dot device. Two types of hysteretic steps in the leakage current are observed on sweeping the magnetic field and are associated with bidirectional polarization of nuclear spin. Properties of the steps are understood in terms of bias-voltage-dependent conditions for the mixing of quadruplet and doublet spin states by the hyperfine interaction. The hysteretic steps vanish when up- and down-nuclear spin pumping processes are in close competition.},
doi = {10.1063/1.4919101},
url = {https://www.osti.gov/biblio/22398964}, journal = {Applied Physics Letters},
issn = {0003-6951},
number = 17,
volume = 106,
place = {United States},
year = {Mon Apr 27 00:00:00 EDT 2015},
month = {Mon Apr 27 00:00:00 EDT 2015}
}