Novel scaling laws for band gaps of quantum dots

Xihong Peng, Surya Ganti, Pradeep Sharma, Azar Alizadeh, Saroj Nayak, Sanat Kumar

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

We present new scaling laws that govern coupled mechanical deformation and opto-electronic properties (band gap) of quantum dots. Our theoretical work on quantum dots, confirmed via electronic structure calculation based on density functional theory indicates that novel size effects in band gap (above and beyond the well studied quantum confinement, electrostatic interaction and mechanical strain coupling) become operative in the 1-5 nm size range. These new coupled size-effects illustrated for Silicon clusters arise out of the size-dependency of the mechanical strain which has traditionally been ignored and devoid in classical continuum field theories (and what is typically employed by most current studies of strain-quantum dot coupling). The surface energies which induce the aforementioned size-effect are themselves found to be size-dependent for extremely small cluster size and peak within a very narrow cluster size range (0.6-2 nm).

Original languageEnglish (US)
Pages (from-to)469-472
Number of pages4
JournalJournal of Computational and Theoretical Nanoscience
Volume2
Issue number3
DOIs
StatePublished - Sep 2005
Externally publishedYes

Fingerprint

Scaling laws
Band Gap
Scaling Laws
Quantum Dots
scaling laws
Semiconductor quantum dots
Energy gap
quantum dots
Size Effect
Quantum confinement
Silicon
Coulomb interactions
Interfacial energy
Electronic properties
Electronic structure
Density functional theory
Electronic Properties
Surface Energy
Optoelectronics
Electronic Structure

Keywords

  • Quantum dots
  • Scaling laws
  • Size-effect
  • Strain
  • Surface energy

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Electronic, Optical and Magnetic Materials
  • Computational Theory and Mathematics

Cite this

Novel scaling laws for band gaps of quantum dots. / Peng, Xihong; Ganti, Surya; Sharma, Pradeep; Alizadeh, Azar; Nayak, Saroj; Kumar, Sanat.

In: Journal of Computational and Theoretical Nanoscience, Vol. 2, No. 3, 09.2005, p. 469-472.

Research output: Contribution to journalArticle

Peng, X, Ganti, S, Sharma, P, Alizadeh, A, Nayak, S & Kumar, S 2005, 'Novel scaling laws for band gaps of quantum dots', Journal of Computational and Theoretical Nanoscience, vol. 2, no. 3, pp. 469-472. https://doi.org/10.1166/jctn.2005.202
Peng, Xihong ; Ganti, Surya ; Sharma, Pradeep ; Alizadeh, Azar ; Nayak, Saroj ; Kumar, Sanat. / Novel scaling laws for band gaps of quantum dots. In: Journal of Computational and Theoretical Nanoscience. 2005 ; Vol. 2, No. 3. pp. 469-472.
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