uu.seUppsala University Publications
Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Hydrogenic donor in a CdSe/CdS quantum dot: Effect of electric field strength, nanodot shape and dielectric environment on the energy spectrum
Univ Moulay Ismail, Fac Sci, Phys Dept, Unite Associee CNRST URAC 08,LP2MS, BP 11201, Meknes, Morocco.
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Materials Theory. Univ Moulay Ismail, Fac Sci, Phys Dept, Unite Associee CNRST URAC 08,LP2MS, BP 11201, Meknes, Morocco.
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Materials Theory. Univ Moulay Ismail, Fac Sci, Phys Dept, Unite Associee CNRST URAC 08,LP2MS, BP 11201, Meknes, Morocco;Univ Lorraine, LCP A2MC, F-57000 Metz, France.
Univ Lorraine, LCP A2MC, F-57000 Metz, France.
Show others and affiliations
2018 (English)In: Physica. E, Low-Dimensional systems and nanostructures, ISSN 1386-9477, E-ISSN 1873-1759, Vol. 104, p. 29-35Article in journal (Refereed) Published
Abstract [en]

The impact of an external electric field on the binding energy of a single donor impurity was examined within the effective-mass approach by deploying a variational calculation. The discontinuity of the permittivity, epsilon(r), and of the particle effective mass, m(i)*(r), at the nanosystem boundaries was considered. Using the image charge approach, the impact of the surrounding medium on the shallow donor energy spectrum was also taken into account. Our theoretical investigation shows that, for zero electric field and when the shell thickness is taken constant, the increase of the core material size leads to decrease the single donor correlation energy. Further, for a fixed core material size the energy decreases quickly when the shell thickness moves from 0 to 1 nm, while it decreases very slowly when the shell thickness is ranged between 1 nm and 4 nm. On the other hand, we have established that when we turn on an external electric field, the probability density of confined particles tends to move towards the nanodot border which naturally shifts the energy spectrum to lower energies (redshift). It was also obtained that the donor Stark shift depends not only on the nanodot size, but also on the surrounding medium.

Place, publisher, year, edition, pages
2018. Vol. 104, p. 29-35
Keywords [en]
Shallow donor, Core/shell materials, Nanostructures, Quantum dots
National Category
Condensed Matter Physics
Identifiers
URN: urn:nbn:se:uu:diva-364136DOI: 10.1016/j.physe.2018.07.010ISI: 000443990400006OAI: oai:DiVA.org:uu-364136DiVA, id: diva2:1260734
Funder
Swedish Research Council, 348-2011-7264Available from: 2018-11-05 Created: 2018-11-05 Last updated: 2018-11-05Bibliographically approved

Open Access in DiVA

No full text in DiVA

Other links

Publisher's full text

Authority records BETA

Ainane, AbdelmajidAhuja, Rajeev

Search in DiVA

By author/editor
Ainane, AbdelmajidAhuja, Rajeev
By organisation
Materials Theory
In the same journal
Physica. E, Low-Dimensional systems and nanostructures
Condensed Matter Physics

Search outside of DiVA

GoogleGoogle Scholar

doi
urn-nbn

Altmetric score

doi
urn-nbn
Total: 54 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf