Stacking mismatch boundaries in GaN: Implications for substrate selection

David Smith, S. C Y Tsen, B. N. Sverdlov, G. Martin, H. Morkoç

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

The defect microstructure of thin wurtzite GaN films grown by plasma-assisted molecular beam epitaxy on 6H SiC (basal plane) and sapphire (c-plane) has been characterized using transmission electron microscopy. The predominant defects observed were double positioning boundaries that originated at the interfaces between the substrate and the buffer layer or the buffer and the GaN film. Since the stacking mismatch between coalescing domains is caused by substrate surface steps, these defects could also be termed stacking mismatch boundaries (SMBs). Structural analysis implies that these SMBs are inevitable whenever wurtzite films are grown on non-isomorphic substrates. It is therefore suggested that isomorphic materials such as bulk GaN or ZnO should be investigated as alternative substrates.

Original languageEnglish (US)
Pages (from-to)349-352
Number of pages4
JournalSolid-State Electronics
Volume41
Issue number2 SPEC. ISS.
StatePublished - Feb 1997

Fingerprint

Substrates
wurtzite
Defects
defects
buffers
Aluminum Oxide
Buffer layers
structural analysis
Molecular beam epitaxy
Sapphire
Structural analysis
coalescing
positioning
Buffers
sapphire
molecular beam epitaxy
Transmission electron microscopy
Plasmas
transmission electron microscopy
microstructure

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Smith, D., Tsen, S. C. Y., Sverdlov, B. N., Martin, G., & Morkoç, H. (1997). Stacking mismatch boundaries in GaN: Implications for substrate selection. Solid-State Electronics, 41(2 SPEC. ISS.), 349-352.

Stacking mismatch boundaries in GaN : Implications for substrate selection. / Smith, David; Tsen, S. C Y; Sverdlov, B. N.; Martin, G.; Morkoç, H.

In: Solid-State Electronics, Vol. 41, No. 2 SPEC. ISS., 02.1997, p. 349-352.

Research output: Contribution to journalArticle

Smith, D, Tsen, SCY, Sverdlov, BN, Martin, G & Morkoç, H 1997, 'Stacking mismatch boundaries in GaN: Implications for substrate selection', Solid-State Electronics, vol. 41, no. 2 SPEC. ISS., pp. 349-352.
Smith D, Tsen SCY, Sverdlov BN, Martin G, Morkoç H. Stacking mismatch boundaries in GaN: Implications for substrate selection. Solid-State Electronics. 1997 Feb;41(2 SPEC. ISS.):349-352.
Smith, David ; Tsen, S. C Y ; Sverdlov, B. N. ; Martin, G. ; Morkoç, H. / Stacking mismatch boundaries in GaN : Implications for substrate selection. In: Solid-State Electronics. 1997 ; Vol. 41, No. 2 SPEC. ISS. pp. 349-352.
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