Band structure interpretation of the optical transitions between low-lying conduction bands in n-type doped SiC polytypes

W. R L Lambrecht, S. Limpijumnong, Sergey Rashkeev, B. Segall

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

The optical absorption spectra corresponding to transitions between the first few conduction bands, which have been observed in various fairly heavily n-type doped polytypes of SiC, are calculated from first-principles. In 6H-SiC, these spectra provide evidence for the existence of a saddle-point structure in the lowest conduction band at the M point. Good agreement is obtained for the peak positions and the polarization dependence of the spectra. Discrepancies in peak intensities and widths are discussed.

Original languageEnglish
Pages (from-to)271-274
Number of pages4
JournalMaterials Science Forum
Volume264-268
Issue numberPART 1
Publication statusPublished - 1 Dec 1998
Externally publishedYes

Fingerprint

Optical transitions
Conduction bands
optical transition
Band structure
conduction bands
saddle points
Electron transitions
Light absorption
optical spectrum
Absorption spectra
optical absorption
Polarization
absorption spectra
polarization

Keywords

  • Band Structure
  • Optical Absorption

ASJC Scopus subject areas

  • Materials Science(all)

Cite this

Band structure interpretation of the optical transitions between low-lying conduction bands in n-type doped SiC polytypes. / Lambrecht, W. R L; Limpijumnong, S.; Rashkeev, Sergey; Segall, B.

In: Materials Science Forum, Vol. 264-268, No. PART 1, 01.12.1998, p. 271-274.

Research output: Contribution to journalArticle

@article{7a405f8d98c4422e875378c96ec7b47f,
title = "Band structure interpretation of the optical transitions between low-lying conduction bands in n-type doped SiC polytypes",
abstract = "The optical absorption spectra corresponding to transitions between the first few conduction bands, which have been observed in various fairly heavily n-type doped polytypes of SiC, are calculated from first-principles. In 6H-SiC, these spectra provide evidence for the existence of a saddle-point structure in the lowest conduction band at the M point. Good agreement is obtained for the peak positions and the polarization dependence of the spectra. Discrepancies in peak intensities and widths are discussed.",
keywords = "Band Structure, Optical Absorption",
author = "Lambrecht, {W. R L} and S. Limpijumnong and Sergey Rashkeev and B. Segall",
year = "1998",
month = "12",
day = "1",
language = "English",
volume = "264-268",
pages = "271--274",
journal = "Materials Science Forum",
issn = "0255-5476",
publisher = "Trans Tech Publications",
number = "PART 1",

}

TY - JOUR

T1 - Band structure interpretation of the optical transitions between low-lying conduction bands in n-type doped SiC polytypes

AU - Lambrecht, W. R L

AU - Limpijumnong, S.

AU - Rashkeev, Sergey

AU - Segall, B.

PY - 1998/12/1

Y1 - 1998/12/1

N2 - The optical absorption spectra corresponding to transitions between the first few conduction bands, which have been observed in various fairly heavily n-type doped polytypes of SiC, are calculated from first-principles. In 6H-SiC, these spectra provide evidence for the existence of a saddle-point structure in the lowest conduction band at the M point. Good agreement is obtained for the peak positions and the polarization dependence of the spectra. Discrepancies in peak intensities and widths are discussed.

AB - The optical absorption spectra corresponding to transitions between the first few conduction bands, which have been observed in various fairly heavily n-type doped polytypes of SiC, are calculated from first-principles. In 6H-SiC, these spectra provide evidence for the existence of a saddle-point structure in the lowest conduction band at the M point. Good agreement is obtained for the peak positions and the polarization dependence of the spectra. Discrepancies in peak intensities and widths are discussed.

KW - Band Structure

KW - Optical Absorption

UR - http://www.scopus.com/inward/record.url?scp=0031675060&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0031675060&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:0031675060

VL - 264-268

SP - 271

EP - 274

JO - Materials Science Forum

JF - Materials Science Forum

SN - 0255-5476

IS - PART 1

ER -