Shape and composition map of a prepyramid quantum dot

B. J. Spencer; M. Blanariu

doi:10.1103/PhysRevLett.95.206101

Shape and composition map of a prepyramid quantum dot

B. J. Spencer
, M. Blanariu

Mathematics

SUNY Buffalo

Research output: Contribution to journal › Article › peer-review

41 Scopus citations

Abstract

We present a theory for the shape, size, and nonuniform composition profile of a small prepyramid island in an alloy epitaxial film when surface diffusion is much faster than deposition and bulk diffusion. The predicted composition profile has segregation of the larger misfit component to the island peak, with segregation enhanced by misfit strain and solute strain but retarded by alloy solution thermodynamics. Vertical composition gradients through the center of the island due to this mechanism are on the order of 2%/nm for GeXSi1-X/Si and 10-15%/nm for InXGa1-XAs/GaAs.

Original language	English
Article number	206101
Journal	Physical Review Letters
Volume	95
Issue number	20
DOIs	https://doi.org/10.1103/PhysRevLett.95.206101
State	Published - Nov 11 2005

Access to Document

10.1103/PhysRevLett.95.206101

Cite this

@article{c9e9de37885b4fc587544841261185a0,

title = "Shape and composition map of a prepyramid quantum dot",

abstract = "We present a theory for the shape, size, and nonuniform composition profile of a small prepyramid island in an alloy epitaxial film when surface diffusion is much faster than deposition and bulk diffusion. The predicted composition profile has segregation of the larger misfit component to the island peak, with segregation enhanced by misfit strain and solute strain but retarded by alloy solution thermodynamics. Vertical composition gradients through the center of the island due to this mechanism are on the order of 2\%/nm for GeXSi1-X/Si and 10-15\%/nm for InXGa1-XAs/GaAs.",

author = "Spencer, \{B. J.\} and M. Blanariu",

year = "2005",

month = nov,

day = "11",

doi = "10.1103/PhysRevLett.95.206101",

language = "English",

volume = "95",

journal = "Physical Review Letters",

issn = "0031-9007",

publisher = "American Physical Society",

number = "20",

}

TY - JOUR

T1 - Shape and composition map of a prepyramid quantum dot

AU - Spencer, B. J.

AU - Blanariu, M.

PY - 2005/11/11

Y1 - 2005/11/11

N2 - We present a theory for the shape, size, and nonuniform composition profile of a small prepyramid island in an alloy epitaxial film when surface diffusion is much faster than deposition and bulk diffusion. The predicted composition profile has segregation of the larger misfit component to the island peak, with segregation enhanced by misfit strain and solute strain but retarded by alloy solution thermodynamics. Vertical composition gradients through the center of the island due to this mechanism are on the order of 2%/nm for GeXSi1-X/Si and 10-15%/nm for InXGa1-XAs/GaAs.

AB - We present a theory for the shape, size, and nonuniform composition profile of a small prepyramid island in an alloy epitaxial film when surface diffusion is much faster than deposition and bulk diffusion. The predicted composition profile has segregation of the larger misfit component to the island peak, with segregation enhanced by misfit strain and solute strain but retarded by alloy solution thermodynamics. Vertical composition gradients through the center of the island due to this mechanism are on the order of 2%/nm for GeXSi1-X/Si and 10-15%/nm for InXGa1-XAs/GaAs.

UR - https://www.scopus.com/pages/publications/28844459840

U2 - 10.1103/PhysRevLett.95.206101

DO - 10.1103/PhysRevLett.95.206101

M3 - Article

AN - SCOPUS:28844459840

SN - 0031-9007

VL - 95

JO - Physical Review Letters

JF - Physical Review Letters

IS - 20

M1 - 206101

ER -

Shape and composition map of a prepyramid quantum dot

Abstract

Access to Document

Other files and links

Fingerprint

Cite this