Surface conductivity of diamond as a function of nitrogen doping

Citation
J. Ristein et al., Surface conductivity of diamond as a function of nitrogen doping, PHYS ST S-A, 186(2), 2001, pp. 249-256
Citations number
15
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
PHYSICA STATUS SOLIDI A-APPLIED RESEARCH
ISSN journal
00318965 → ACNP
Volume
186
Issue
2
Year of publication
2001
Pages
249 - 256
Database
ISI
SICI code
0031-8965(20010723)186:2<249:SCODAA>2.0.ZU;2-E
Abstract
The surface conductivity of diamond has recently attracted a lot of interes t since a number of electronic applications proposed for diamond are based on this effect. Nevertheless, its microscopic origin is still a matter of d ebate. We describe in the following experiments in which the impact of the bulk defect concentration of diamond on the surface conductivity is investi gated. The experiments show that surface conductivity is suppressed in the presence of donor-like nitrogen defects although the surfaces are clearly h ydrogen (or deuterium) terminated. We suggest compensation of the surface o r surface near acceptors to be the reason for this suppression. A quantitat ive discussion shows that the doping capability of the surface acceptors is exhausted at lateral concentrations of about 3 x 10(13) cm(-2).