Evidence for 2D Precursors and Interdiffusion in the Evolution of Self-Assembled CdSe Quantum Dots on ZnSe

C. S. Kim; M. Kim; J. K. Furdyna; M. Dobrowolska; S. Lee; H. Rho; L. M. Smith; Howard E. Jackson; E. M. James; Y. Xin; N. D. Browning

doi:10.1103/PhysRevLett.85.1124

Evidence for 2D Precursors and Interdiffusion in the Evolution of Self-Assembled CdSe Quantum Dots on ZnSe

C. S. Kim, M. Kim, J. K. Furdyna, M. Dobrowolska, S. Lee, H. Rho, L. M. Smith, Howard E. Jackson, E. M. James, Y. Xin, and N. D. Browning

Phys. Rev. Lett. 85, 1124 – Published 31 July 2000

Abstract

The evolution of self-assembled CdSe quantum dots deposited on (and subsequently capped by) ZnSe was investigated on a series of samples grown by molecular beam epitaxy, with CdSe coverages from 0.5 to 2.6 monolayers. The samples were investigated by cross-sectional scanning transmission electron microscopy, as well as macro- and microphotoluminescence. The results clearly indicated a coexistence of 2D ZnCdSe platelets and 3D islands, showing clearly that the platelets act as precursors for the formation of the 3D islands.

Received 22 December 1999

DOI:https://doi.org/10.1103/PhysRevLett.85.1124

Authors & Affiliations

C. S. Kim¹, M. Kim¹, J. K. Furdyna¹, M. Dobrowolska^1,*, S. Lee², H. Rho³, L. M. Smith³, Howard E. Jackson³, E. M. James⁴, Y. Xin⁴, and N. D. Browning⁴

¹Department of Physics, University of Notre Dame, Notre Dame, Indiana 46556
²Department of Electronic Materials Engineering, Kwangwoon University, Seoul, 139-701 Korea
³Department of Physics, University of Cincinnati, Cincinnati, Ohio 45221
⁴Department of Physics, University of Illinois at Chicago, Chicago, Illinois 60607