Enhanced quantum confinement due to nonuniform composition in alloy quantum dots

M. Z. Hossain, N. V. Medhekar, V. B. Shenoy, H. T. Johnson

Research output: Contribution to journalArticle

Abstract

Strain and nanoscale variations in composition can significantly alter the electronic and optical properties of self-assembled alloy quantum systems. Using a combination of finite element and first-principles methods, we have developed an efficient and accurate technique to study the influence of strain and composition on the quantum confinement behavior in alloy quantum dots. Interestingly, we find that a nonuniform distribution of alloy components can lead to an enhanced confinement potential that allows a large quantum dot to behave electronically in a manner similar to a much smaller dot. The approach presented here provides a general means to quantitatively predict the influence of strain and composition variations on the performance characteristics of various small-scale alloy systems.

Original languageEnglish (US)
JournalNanotechnology
Volume21
Issue number9
DOIs
StatePublished - 2010

Fingerprint

Quantum confinement
Semiconductor quantum dots
Chemical analysis
Electronic properties
Optical properties

ASJC Scopus subject areas

  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering
  • Electrical and Electronic Engineering

Cite this

Enhanced quantum confinement due to nonuniform composition in alloy quantum dots. / Hossain, M. Z.; Medhekar, N. V.; Shenoy, V. B.; Johnson, H. T.

In: Nanotechnology, Vol. 21, No. 9, 2010.

Research output: Contribution to journalArticle

Hossain, M. Z. ; Medhekar, N. V. ; Shenoy, V. B. ; Johnson, H. T. / Enhanced quantum confinement due to nonuniform composition in alloy quantum dots. In: Nanotechnology. 2010 ; Vol. 21, No. 9.
@article{14169e9ac1684b13877d3e53929e4d4c,
title = "Enhanced quantum confinement due to nonuniform composition in alloy quantum dots",
abstract = "Strain and nanoscale variations in composition can significantly alter the electronic and optical properties of self-assembled alloy quantum systems. Using a combination of finite element and first-principles methods, we have developed an efficient and accurate technique to study the influence of strain and composition on the quantum confinement behavior in alloy quantum dots. Interestingly, we find that a nonuniform distribution of alloy components can lead to an enhanced confinement potential that allows a large quantum dot to behave electronically in a manner similar to a much smaller dot. The approach presented here provides a general means to quantitatively predict the influence of strain and composition variations on the performance characteristics of various small-scale alloy systems.",
author = "Hossain, {M. Z.} and Medhekar, {N. V.} and Shenoy, {V. B.} and Johnson, {H. T.}",
year = "2010",
doi = "10.1088/0957-4484/21/9/095401",
language = "English (US)",
volume = "21",
journal = "Nanotechnology",
issn = "0957-4484",
publisher = "IOP Publishing Ltd.",
number = "9",

}

TY - JOUR

T1 - Enhanced quantum confinement due to nonuniform composition in alloy quantum dots

AU - Hossain, M. Z.

AU - Medhekar, N. V.

AU - Shenoy, V. B.

AU - Johnson, H. T.

PY - 2010

Y1 - 2010

N2 - Strain and nanoscale variations in composition can significantly alter the electronic and optical properties of self-assembled alloy quantum systems. Using a combination of finite element and first-principles methods, we have developed an efficient and accurate technique to study the influence of strain and composition on the quantum confinement behavior in alloy quantum dots. Interestingly, we find that a nonuniform distribution of alloy components can lead to an enhanced confinement potential that allows a large quantum dot to behave electronically in a manner similar to a much smaller dot. The approach presented here provides a general means to quantitatively predict the influence of strain and composition variations on the performance characteristics of various small-scale alloy systems.

AB - Strain and nanoscale variations in composition can significantly alter the electronic and optical properties of self-assembled alloy quantum systems. Using a combination of finite element and first-principles methods, we have developed an efficient and accurate technique to study the influence of strain and composition on the quantum confinement behavior in alloy quantum dots. Interestingly, we find that a nonuniform distribution of alloy components can lead to an enhanced confinement potential that allows a large quantum dot to behave electronically in a manner similar to a much smaller dot. The approach presented here provides a general means to quantitatively predict the influence of strain and composition variations on the performance characteristics of various small-scale alloy systems.

UR - http://www.scopus.com/inward/record.url?scp=84908687682&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84908687682&partnerID=8YFLogxK

U2 - 10.1088/0957-4484/21/9/095401

DO - 10.1088/0957-4484/21/9/095401

M3 - Article

AN - SCOPUS:84908687682

VL - 21

JO - Nanotechnology

JF - Nanotechnology

SN - 0957-4484

IS - 9

ER -