Diamond C 1s core-level excitons: surface sensitivity

Stacey, Alastair, Cowie, Bruce C. C., Orwa, Julius, Prawer, Steven and Hoffman, Alon 2010, Diamond C 1s core-level excitons: surface sensitivity, Physical review B, vol. 82, no. 12, pp. 1-7, doi: 10.1103/PhysRevB.82.125427.

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Title Diamond C 1s core-level excitons: surface sensitivity
Author(s) Stacey, Alastair
Cowie, Bruce C. C.
Orwa, JuliusORCID iD for Orwa, Julius orcid.org/0000-0001-6041-6751
Prawer, Steven
Hoffman, Alon
Journal name Physical review B
Volume number 82
Issue number 12
Article ID 1254727
Start page 1
End page 7
Total pages 7
Publisher American Physical Society
Place of publication College Park, Md.
Publication date 2010-09-15
ISSN 1098-0121
Keyword(s) Science & Technology
Physical Sciences
Physics, Condensed Matter
Summary The effect of surface termination on C 1s core-level bulk excitons found near the surface in single-crystal diamond is reported. By simultaneously recording bulk (total electron yield) and surface (partial electron yield) near-edge x-ray absorption fine-structure (NEXAFS) spectra with a range of single-crystal surface terminations, variable bulk exciton energy blueshifts and linewidth broadening were observed, most notably in the reconstructed single-crystal diamond. Investigation of polycrystalline diamond and ultrananocrystalline diamond films, using the same technique, allowed for a comparison between the reconstructed single-crystal diamond surface and nanodiamond bulk excitons. These findings suggest that surface-related effects can be misinterpreted as quantum confinement in some nanodiamond NEXAFS studies. Band bending is suggested as a possible contributor to these results.
Language eng
DOI 10.1103/PhysRevB.82.125427
Field of Research 020406 Surfaces and Structural Properties of Condensed Matter
Socio Economic Objective 970102 Expanding Knowledge in the Physical Sciences
HERDC Research category C1.1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Copyright notice ©2010, American Physical Society
Persistent URL http://hdl.handle.net/10536/DRO/DU:30091854

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