Finite element analysis of valence band structures in quantum wires

Seoung Hwan Park; Doyeol Ahn; Yong Tak Lee

doi:10.1063/1.1766092

Finite element analysis of valence band structures in quantum wires

Seoung Hwan Park, Doyeol Ahn, Yong Tak Lee

School of Electrical and Computer Engineering

Research output: Contribution to journal › Article › peer-review

27 Scopus citations

Abstract

The multiband effective-mass theory was used for investigating the valence band structures with spin-orbit (SO) coupling of quantum wires (QWR). The calculation procedure was based on finite element method (FEM) and finite difference method (FDM) without SO coupling, the results of which were compared. The SO coupling effect did not change subband energies and the trends of the subband dispersions in QWR with small strains. The SO coupling in QWR with larger strains affected the subband energies of all states including the first state. It was found that due to the coupling effect, the matrix elements for the TE polarization were greatly increased.

Original language	English
Pages (from-to)	2055-2062
Number of pages	8
Journal	Journal of Applied Physics
Volume	96
Issue number	4
DOIs	https://doi.org/10.1063/1.1766092
State	Published - 15 Aug 2004

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AB - The multiband effective-mass theory was used for investigating the valence band structures with spin-orbit (SO) coupling of quantum wires (QWR). The calculation procedure was based on finite element method (FEM) and finite difference method (FDM) without SO coupling, the results of which were compared. The SO coupling effect did not change subband energies and the trends of the subband dispersions in QWR with small strains. The SO coupling in QWR with larger strains affected the subband energies of all states including the first state. It was found that due to the coupling effect, the matrix elements for the TE polarization were greatly increased.

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Finite element analysis of valence band structures in quantum wires

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