Low-density framework form of crystalline silicon with a wide optical band gap

J. Gryko, P. F. McMillan, R. F. Marzke, G. K. Ramachandran, D. Patton, S. K. Deb, O. F. Sankey

Research output: Contribution to journalArticle

220 Citations (Scopus)

Abstract

Synthesis of a guest-free clathrate form of crystalline silicon was achieved by successive vacuum treatment and density separation of NaxSi136-based materials. The new allotrope of silicon has an open framework structure based upon slightly distorted tetrahedral atoms bound into five- and six-membered ring structures, and corresponds to a fully saturated and condensed fullerane-type solid. Theoretical calculations indicate that the new form of silicon should be a wide bandgap semiconductor. This prediction is borne out by experiment: electrical conductivity and optical absorption measurements yield a band gap of 1.9 eV, approximately twice the value of "normal" semiconducting silicon.

Original languageEnglish (US)
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume62
Issue number12
DOIs
StatePublished - Sep 15 2000
Externally publishedYes

Fingerprint

Optical band gaps
Silicon
Crystalline materials
Semiconducting silicon
Energy gap
silicon
Light absorption
clathrates
ring structures
Vacuum
Semiconductor materials
Atoms
optical absorption
vacuum
electrical resistivity
synthesis
predictions
Experiments
atoms

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Gryko, J., McMillan, P. F., Marzke, R. F., Ramachandran, G. K., Patton, D., Deb, S. K., & Sankey, O. F. (2000). Low-density framework form of crystalline silicon with a wide optical band gap. Physical Review B - Condensed Matter and Materials Physics, 62(12). https://doi.org/10.1103/PhysRevB.62.R7707

Low-density framework form of crystalline silicon with a wide optical band gap. / Gryko, J.; McMillan, P. F.; Marzke, R. F.; Ramachandran, G. K.; Patton, D.; Deb, S. K.; Sankey, O. F.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 62, No. 12, 15.09.2000.

Research output: Contribution to journalArticle

Gryko, J. ; McMillan, P. F. ; Marzke, R. F. ; Ramachandran, G. K. ; Patton, D. ; Deb, S. K. ; Sankey, O. F. / Low-density framework form of crystalline silicon with a wide optical band gap. In: Physical Review B - Condensed Matter and Materials Physics. 2000 ; Vol. 62, No. 12.
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