Enhanced quantum confinement due to nonuniform composition in alloy quantum dots

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

doi:10.1088/0957-4484/21/9/095401

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 journal › Article › peer-review

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 language	English (US)
Journal	Nanotechnology
Volume	21
Issue number	9
DOIs	https://doi.org/10.1088/0957-4484/21/9/095401
State	Published - 2010

ASJC Scopus subject areas

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

Online availability

10.1088/0957-4484/21/9/095401

Library availability

Discover UIUC Full Text

Cite this

@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.}",

note = "Publisher Copyright: {\textcopyright} 2010 IOP Publishing Ltd.",

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

C2 - 20124666

AN - SCOPUS:84908687682

SN - 0957-4484

VL - 21

JO - Nanotechnology

JF - Nanotechnology

IS - 9

ER -

Enhanced quantum confinement due to nonuniform composition in alloy quantum dots

Abstract

ASJC Scopus subject areas

Online availability

Library availability

Related links

Fingerprint

Cite this