Band gap of strain-symmetrized, short-period Si/Ge superlattices

Janos Olajos; Jesper Engvall; Hermann G. Grimmeiss; Ulrich Menczigar; Gerhard Abstreiter; Horst Kibbel; Erich Kasper; Hartmut Presting

doi:10.1103/PhysRevB.46.12857

Band gap of strain-symmetrized, short-period Si/Ge superlattices

Janos Olajos
, Jesper Engvall
, Hermann G. Grimmeiss
, Ulrich Menczigar
, Gerhard Abstreiter
, Horst Kibbel
, Erich Kasper
, Hartmut Presting

TUM Emeriti of Excellence

Lund University
Walter Schottky Institut
Daimler-Benz AG

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

28 Scopus citations

Abstract

We report an identification and determination of the band-gap energies in a series of strain-symmetrized Sin/Gen superlattices. Absorption onsets are observed that shift toward higher energies with decreasing period length in superlattices with identical Si/Ge ratio. Band-gap energies of 0.67, 0.76, and 0.88 eV for Si6/Ge6, Si5/Ge5, and Si4/Ge4 superlattices, respectively, are determined by a fitting procedure. Strong photoluminescence and electroluminescence are observed for the Si5/Ge5 superlattices. The energetic position indicates that the luminescence is related to interband transitions.

Original language	English
Pages (from-to)	12857-12860
Number of pages	4
Journal	Physical Review B
Volume	46
Issue number	19
DOIs	https://doi.org/10.1103/PhysRevB.46.12857
State	Published - 1992

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title = "Band gap of strain-symmetrized, short-period Si/Ge superlattices",

abstract = "We report an identification and determination of the band-gap energies in a series of strain-symmetrized Sin/Gen superlattices. Absorption onsets are observed that shift toward higher energies with decreasing period length in superlattices with identical Si/Ge ratio. Band-gap energies of 0.67, 0.76, and 0.88 eV for Si6/Ge6, Si5/Ge5, and Si4/Ge4 superlattices, respectively, are determined by a fitting procedure. Strong photoluminescence and electroluminescence are observed for the Si5/Ge5 superlattices. The energetic position indicates that the luminescence is related to interband transitions.",

author = "Janos Olajos and Jesper Engvall and Grimmeiss, \{Hermann G.\} and Ulrich Menczigar and Gerhard Abstreiter and Horst Kibbel and Erich Kasper and Hartmut Presting",

year = "1992",

doi = "10.1103/PhysRevB.46.12857",

language = "English",

volume = "46",

pages = "12857--12860",

journal = "Physical Review B",

issn = "0163-1829",

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T1 - Band gap of strain-symmetrized, short-period Si/Ge superlattices

AU - Olajos, Janos

AU - Engvall, Jesper

AU - Grimmeiss, Hermann G.

AU - Menczigar, Ulrich

AU - Abstreiter, Gerhard

AU - Kibbel, Horst

AU - Kasper, Erich

AU - Presting, Hartmut

PY - 1992

Y1 - 1992

N2 - We report an identification and determination of the band-gap energies in a series of strain-symmetrized Sin/Gen superlattices. Absorption onsets are observed that shift toward higher energies with decreasing period length in superlattices with identical Si/Ge ratio. Band-gap energies of 0.67, 0.76, and 0.88 eV for Si6/Ge6, Si5/Ge5, and Si4/Ge4 superlattices, respectively, are determined by a fitting procedure. Strong photoluminescence and electroluminescence are observed for the Si5/Ge5 superlattices. The energetic position indicates that the luminescence is related to interband transitions.

AB - We report an identification and determination of the band-gap energies in a series of strain-symmetrized Sin/Gen superlattices. Absorption onsets are observed that shift toward higher energies with decreasing period length in superlattices with identical Si/Ge ratio. Band-gap energies of 0.67, 0.76, and 0.88 eV for Si6/Ge6, Si5/Ge5, and Si4/Ge4 superlattices, respectively, are determined by a fitting procedure. Strong photoluminescence and electroluminescence are observed for the Si5/Ge5 superlattices. The energetic position indicates that the luminescence is related to interband transitions.

UR - https://www.scopus.com/pages/publications/0347718974

U2 - 10.1103/PhysRevB.46.12857

DO - 10.1103/PhysRevB.46.12857

M3 - Article

AN - SCOPUS:0347718974

SN - 0163-1829

VL - 46

SP - 12857

EP - 12860

JO - Physical Review B

JF - Physical Review B

IS - 19

ER -

Band gap of strain-symmetrized, short-period Si/Ge superlattices

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