Exciton–Exciton Interactions in Coaxial Double Quantum Rings

• Published in: Nanomaterials
• Main Authors: Shahnazaryan, Vanik, Mughnetsyan, Vram, Shelykh, Ivan, Sarkisyan, Hayk
• Other Authors: Raunvísindastofnun (HÍ), Science Institute (UI), Verkfræði- og náttúruvísindasvið (HÍ), School of Engineering and Natural Sciences (UI), Háskóli Íslands, University of Iceland
• Format: Article in Journal/Newspaper
• Language: English
• Published: MDPI AG 2019
• Subjects: Coulomb interactions; Exciton; Quantum ring; Skammtafræði; Iceland
• Online Access: https://hdl.handle.net/20.500.11815/1625; https://doi.org/10.3390/nano9101469

Publisher's version (útgefin grein) We study theoretically the quantum states of two interacting excitons in coaxial double quantum rings. An interplay between exciton-exciton Coulomb interactions and specific geometry of the structure leads to the emergence of peculiar energy spectrum of two exciton system. We develop a semi-analytic approach providing highly accurate energies of system in the wide range of values of geometrical parameters relevant to experimental realizations. This work was supported by the EU H2020 RISE project CoExAN (Grant No. H2020-644076). I.S. and V.S. acknowledge support from Megagrant 14.Y26.31.0015 and Goszadanie No. 3.2614.2017/4.6 of the Ministry of Education and Science of Russian Federation. H.S. acknowledges the financial support from the State Committee of Science of RA (research project 18T-1C062). V.M. acknowledges the financial support from the State Committee of Science of RA (research project 18T-1C223) V.S., V.M., and H.S. are grateful to the University of Iceland for hospitality during the work. Peer Reviewed