User account menu

  • Log in
Home
Theoretical Spectroscopy Group

Main navigation

  • Home
  • People
    • Andrea Cucca
    • Christine Giorgetti
    • Francesco Sottile
    • Lucia Reining
    • Matteo Gatti
    • Valerie Veniard
    • Vitaly Gorelov
      • Fatema Mohamed
      • Kevin Leveque-Simon
      • Felana Andriambelaza
      • Maram Ali Ahmed Musa
      • Sarbajit Dutta
      • Marc Aichner
      • Carlos Rodriguez Perez
      • Jean Goossaert
      • Niklas Penner
    • Former Members
  • How to Reach Us
  • Research
    • Strong Correlation
    • Plasmons and EELS
    • Developments in TDDFT
    • Excitons and Exciton Dispersion
    • Larger Public
    • Low dimensional materials
    • Non-linear Optics
    • Scientific goals and main achievements
    • Theory Developments
    • Software
    • Publications
    • Thesis
  • Training
  • ETSF Events

Ab initio and semiempirical dielectric response of superlattices

Breadcrumb

  • Home
  • Ab initio and semiempirical dielectric response of superlattices
Author
Silvana Botti
N Vast
Lucia Reining
Olevano V
LC Andreani
Keywords
paper
Abstract

We present a study of the dielectric response of (GaAs)(p)/(AlAs)(p) (001) superlattices in a wide range of barrier and well widths. We applied density functional theory and a semiempirical method to obtain the superlattice band structures. These were then used as a starting point to evaluate the optical spectra and macroscopic dielectric constants using time-dependent density functional theory. In this context, we investigated the role of crystal local field effects in determining the anisotropy of the dielectric constants. Furthermore, we calculated absorption spectra including the strong continuum excitonic effect through the use of an appropriate model exchange-correlation kernel. We analyzed in detail the complementarity of the ab initio and semiempirical approaches and we compared the successes and limitations of the different approximation schemes.

Year of Publication
2004
Journal
Phys. Rev. B
Volume
70
Date Published
JUL
URL
http://dx.doi.org/10.1103/PhysRevB.70.045301
DOI
10.1103/PhysRevB.70.045301
Download citation
  • DOI
  • Google Scholar
  • BibTeX
  • RIS

Developed & Designed by Alaa Haddad. Customized by ETSF Palaiseau © 2025.