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Binding energy of an exciton in a GaN/AlN nanodot: Role of size and external electric field
Univ Moulay Ismail, Fac Sci, Phys Dept, LP2MS,Unite Associee CNRST URAC 08, BP 11201, Meknes, Morocco.
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy. Univ Moulay Ismail, Fac Sci, Phys Dept, LP2MS,Unite Associee CNRST URAC 08, BP 11201, Meknes, Morocco. (Condensed Matter Theory Group)
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Materials Theory. Univ Moulay Ismail, Fac Sci, Phys Dept, LP2MS,Unite Associee CNRST URAC 08, BP 11201, Meknes, Morocco;Univ Lorraine, LCP A2MC, Inst Chim Phys & Mat, 1 Bd Arago, F-57070 Metz, France. (Condensed Matter Theory Group)ORCID iD: 0000-0003-0710-7292
Univ Lorraine, LCP A2MC, Inst Chim Phys & Mat, 1 Bd Arago, F-57070 Metz, France.
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2019 (English)In: Physica. B, Condensed matter, ISSN 0921-4526, E-ISSN 1873-2135, Vol. 559, p. 23-28Article in journal (Refereed) Published
Abstract [en]

We report the impact of an external electric field on the energy spectrum of an exciton inside a spherical shaped GaN/AlN core/shell nanodot. The modulation of the confined exciton lowest state energy by the nanodot size is also treated. Our theoretical approach, based on a variational calculation, predicts a remarkable decrease in the exciton's energy when the electric field is switched on. Furthermore, our investigation shows that for a fixed nanodot size, the energy redshift is a unique function of the external electric field strength. On the other hand, it was observed that as the nanodot size increases the lowest exciton energy decreases and vice versa.

Place, publisher, year, edition, pages
2019. Vol. 559, p. 23-28
Keywords [en]
Exciton, Core/shell materials, Nanostructures, Quantum dots, Electric field
National Category
Condensed Matter Physics
Identifiers
URN: urn:nbn:se:uu:diva-379325DOI: 10.1016/j.physb.2019.01.047ISI: 000459824700004OAI: oai:DiVA.org:uu-379325DiVA, id: diva2:1299644
Funder
Swedish Research Council, dnr-348-2011-7264Available from: 2019-03-28 Created: 2019-03-28 Last updated: 2019-03-28Bibliographically approved

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Ainane, AbdelmajidAhuja, Rajeev

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