Surface-polarization instabilities of electron-hole pairs in semiconductor quantum dots

L. Bnyai, P. Gilliot, Y. Z. Hu, Stephan W Koch

Research output: Contribution to journalArticle

118 Citations (Scopus)

Abstract

The surface polarization instabilities of a Coulomb-interacting electron-hole pair in a spherical semiconductor quantum dot inside a dielectric medium are studied. Two independent numerical solutions for the ground state are presented which are based on a direct integration of the pair Schrödinger equation or on a diagonalization of the Hamiltonian matrix. For decreasing confinement potential at fixed dot radius, and for decreasing dot radius at fixed confinement potential, it is found that the electron-hole-pair state changes from a volume state, in which both particles are mostly inside the dot, to a surface trapped state, in which the surface polarization causes the carriers to be self-trapped at the surface of the dot. The transition from volume to surface trapped states occurs for parameters which are very close to those of II-VI semiconductors in a glass matrix or in a liquid.

Original languageEnglish (US)
Pages (from-to)14136-14142
Number of pages7
JournalPhysical Review B
Volume45
Issue number24
DOIs
StatePublished - 1992

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Semiconductor quantum dots
quantum dots
Polarization
Electrons
polarization
Hamiltonians
radii
Ground state
Glass
ground state
glass
causes
Liquids
matrices
liquids

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Surface-polarization instabilities of electron-hole pairs in semiconductor quantum dots. / Bnyai, L.; Gilliot, P.; Hu, Y. Z.; Koch, Stephan W.

In: Physical Review B, Vol. 45, No. 24, 1992, p. 14136-14142.

Research output: Contribution to journalArticle

Bnyai, L. ; Gilliot, P. ; Hu, Y. Z. ; Koch, Stephan W. / Surface-polarization instabilities of electron-hole pairs in semiconductor quantum dots. In: Physical Review B. 1992 ; Vol. 45, No. 24. pp. 14136-14142.
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