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Nanomaterials
Volume 11
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10.3390/nano11020493
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Article

Fractional Charge States in the Magneto-Photoluminescence Spectra of Single-Electron InP/GaInP2 Quantum Dots

by
Alexander Mintairov
1,2,*,
Dmitrii Lebedev
1,
Alexei Vlasov
1,
Andrey Bogdanov
3,
Shahab Ramezanpour
3 and
Steven Blundell
4
1
Ioffe Physical-Technical Institute of the Russian Academy of Sciences, 194021 St. Petersburg, Russia
2
Electrical Engineering, University of Notre Dame, Notre Dame, IN 46556, USA
3
Department of Physics and Engineering, ITMO University, 197101 St. Petersburg, Russia
4
SyMMES, IRIG, University Grenoble Alpes, CEA, CNRS, F-38000 Grenoble, France
*
Author to whom correspondence should be addressed.
Nanomaterials 2021, 11(2), 493; https://doi.org/10.3390/nano11020493
Submission received: 24 January 2021 / Revised: 9 February 2021 / Accepted: 13 February 2021 / Published: 16 February 2021
(This article belongs to the Special Issue Semiconductor Heterostructures (with Quantum Wells, Quantum Dots and Superlattices))
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Abstract

We used photoluminescence spectra of single electron quasi-two-dimensional InP/GaInP2 islands having Wigner-Seitz radius ~4 to measure the magnetic-field dispersion of the lowest s, p, and d single-particle states in the range 0–10 T. The measured dispersion revealed up to a nine-fold reduction of the cyclotron frequency, indicating the formation of nano-superconducting anyon or magneto-electron (em) states, in which the corresponding number of magnetic-flux-quanta vortexes and fractional charge were self-generated. We observed a linear increase in the number of vortexes versus the island size, which corresponded to a critical vortex radius equal to the Bohr radius and closed-packed topological vortex arrangements. Our observation explains the microscopic mechanism of vortex attachment in composite fermion theory of the fractional quantum Hall effect, allows its description in terms of self-localization of ems and represents progress towards the goal of engineering anyon properties for fault-tolerant topological quantum gates.
Keywords: quantum dots; magneto-photoluminescence; Wigner localization; fractional quantum Hall effect; topological quantum computing quantum dots; magneto-photoluminescence; Wigner localization; fractional quantum Hall effect; topological quantum computing

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MDPI and ACS Style

Mintairov, A.; Lebedev, D.; Vlasov, A.; Bogdanov, A.; Ramezanpour, S.; Blundell, S. Fractional Charge States in the Magneto-Photoluminescence Spectra of Single-Electron InP/GaInP2 Quantum Dots. Nanomaterials 2021, 11, 493. https://doi.org/10.3390/nano11020493

AMA Style

Mintairov A, Lebedev D, Vlasov A, Bogdanov A, Ramezanpour S, Blundell S. Fractional Charge States in the Magneto-Photoluminescence Spectra of Single-Electron InP/GaInP2 Quantum Dots. Nanomaterials. 2021; 11(2):493. https://doi.org/10.3390/nano11020493

Chicago/Turabian Style

Mintairov, Alexander, Dmitrii Lebedev, Alexei Vlasov, Andrey Bogdanov, Shahab Ramezanpour, and Steven Blundell. 2021. "Fractional Charge States in the Magneto-Photoluminescence Spectra of Single-Electron InP/GaInP2 Quantum Dots" Nanomaterials 11, no. 2: 493. https://doi.org/10.3390/nano11020493

APA Style

Mintairov, A., Lebedev, D., Vlasov, A., Bogdanov, A., Ramezanpour, S., & Blundell, S. (2021). Fractional Charge States in the Magneto-Photoluminescence Spectra of Single-Electron InP/GaInP2 Quantum Dots. Nanomaterials, 11(2), 493. https://doi.org/10.3390/nano11020493

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