Fractional Charge States in the Magneto-Photoluminescence Spectra of Single-Electron InP/GaInP2 Quantum Dots
| Autor: | S. A. Blundell, D. S. Lebedev, Shahab Ramezanpour, Alexei Vlasov, Alexander Mintairov, Andrey Bogdanov |
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| Rok vydání: | 2021 |
| Předmět: |
General Chemical Engineering
Anyon quantum dots 02 engineering and technology topological quantum computing 01 natural sciences Topological quantum computer Article lcsh:Chemistry 0103 physical sciences General Materials Science 010306 general physics fractional quantum Hall effect Physics Condensed matter physics magneto-photoluminescence Radius 021001 nanoscience & nanotechnology Vortex lcsh:QD1-999 Quantum dot Fractional quantum Hall effect Composite fermion Wigner localization 0210 nano-technology Bohr radius |
| Zdroj: | Nanomaterials, Vol 11, Iss 493, p 493 (2021) Nanomaterials Volume 11 Issue 2 |
| ISSN: | 2079-4991 |
| DOI: | 10.3390/nano11020493 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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