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Valence band density of states of zinc-blende and wurtzite InN from x-ray photoemission spectroscopy and first-principles calculations
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King, P. D. C., Veal, T. D. (Tim D.), McConville, C. F., Fuchs, F., Furthmueller, J., Bechstedt, F., Schoermann, J., As, D. J., Lischka, K., Lu, Hai and Schaff, W. J.. (2008) Valence band density of states of zinc-blende and wurtzite InN from x-ray photoemission spectroscopy and first-principles calculations. Physical Review B (Condensed Matter and Materials Physics), Vol.77 (No.11). Article No. 115213. ISSN 1098-0121
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Official URL: http://dx.doi.org/10.1103/PhysRevB.77.115213
Abstract
The valence band density of states (VB-DOS) of zinc-blende InN(001) is investigated using a combination of high-resolution x-ray photoemission spectroscopy and quasiparticle corrected density functional theory. The zinc-blende VB-DOS can be characterized by three main regions: a plateau region after the initial rise in the DOS, followed by a shoulder on this region and a second narrow but intense peak, similar to other III-V and II-VI semiconductor compounds. Good general agreement was observed between the experimental and theoretical results. Tentative evidence for an s-d coupling due to the interaction between valence-like N 2s states and semicore-like In 4d states is also identified. Measurements and calculations for wurtzite InN(11 (2) over bar0) are shown to yield a VB-DOS similar to that of zinc-blende InN, although the nonzero crystal field and different Brillouin zone shape in this case lead to a more complicated band structure which modifies the DOS. In adlayers terminating the InN(11 (2) over bar0) surface are also evident in the experimental VB-DOS, and these are discussed.
| Item Type: | Journal Article |
|---|---|
| Subjects: | Q Science > QC Physics |
| Divisions: | Faculty of Science > Physics |
| Journal or Publication Title: | Physical Review B (Condensed Matter and Materials Physics) |
| Publisher: | American Physical Society |
| ISSN: | 1098-0121 |
| Date: | March 2008 |
| Volume: | Vol.77 |
| Number: | No.11 |
| Number of Pages: | 7 |
| Page Range: | Article No. 115213 |
| Identification Number: | 10.1103/PhysRevB.77.115213 |
| Status: | Peer Reviewed |
| Publication Status: | Published |
| Access rights to Published version: | Restricted or Subscription Access |
| URI: | http://wrap.warwick.ac.uk/id/eprint/30318 |
Data sourced from Thomson Reuters' Web of Knowledge
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