Numerical simulation of three dimensional pyramid quantum dot

Tsung-Min Hwang, Wen Wei Lin, Wei Cheng Wang, Weichung Wang

Research output: Contribution to journalArticle

68 Citations (Scopus)

Abstract

We present a simple and efficient numerical method for the simulation of the three-dimensional pyramid quantum dot heterostructure. The pyramid-shaped quantum dot is placed in a computational box with uniform mesh in Cartesian coordinates. The corresponding Schrödinger equation is discretized using the finite volume method and the interface conditions are incorporated into the discretization scheme without explicitly enforcing them. The resulting matrix eigenvalue problem is then solved using a Jacobi-Davidson based method. Both linear and non-linear eigenvalue problems are simulated. The scheme is 2nd order accurate and converges extremely fast. The superior performance is a combined effect of the uniform spacing of the grids and the nice structure of the resulting matrices. We have successfully simulated a variety of test problems, including a quintic polynomial eigenvalue problem with more than 32 million variables.

Original languageEnglish
Pages (from-to)208-232
Number of pages25
JournalJournal of Computational Physics
Volume196
Issue number1
DOIs
Publication statusPublished - 2004 May 1

Fingerprint

pyramids
Semiconductor quantum dots
eigenvalues
quantum dots
Computer simulation
Finite volume method
Heterojunctions
Numerical methods
Cartesian coordinates
simulation
finite volume method
Polynomials
boxes
mesh
polynomials
grids
spacing
matrices

Keywords

  • Finite volume method
  • Heterostucture
  • Large scale polynomial eigenvalue problem
  • Schrödinger equation
  • Semiconductor pyramid quantum dot

ASJC Scopus subject areas

  • Numerical Analysis
  • Modelling and Simulation
  • Physics and Astronomy (miscellaneous)
  • Physics and Astronomy(all)
  • Computer Science Applications
  • Computational Mathematics
  • Applied Mathematics

Cite this

Numerical simulation of three dimensional pyramid quantum dot. / Hwang, Tsung-Min; Lin, Wen Wei; Wang, Wei Cheng; Wang, Weichung.

In: Journal of Computational Physics, Vol. 196, No. 1, 01.05.2004, p. 208-232.

Research output: Contribution to journalArticle

Hwang, Tsung-Min ; Lin, Wen Wei ; Wang, Wei Cheng ; Wang, Weichung. / Numerical simulation of three dimensional pyramid quantum dot. In: Journal of Computational Physics. 2004 ; Vol. 196, No. 1. pp. 208-232.
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