An impedance spectroscopic investigation of the electrical properties of δ -doped diamond structures

Niall Tumilty, Joseph Welch, Richard Lang, Christopher Wort, Richard Balmer, Richard B. Jackman

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

Impedance spectroscopy has been used to investigate the conductivity displayed by diamond doped with boron in an intrinsic- δ -layer-intrinsic multilayer system with differing δ -layer thicknesses. Carrier transport within 5 nm δ -layer structures is complex, being dominated by conduction in the interfacial regions between the δ -layer and the intrinsic regions, as well as conduction within the δ -layer itself. In the case of 3.2 nm thick δ -layers the situation appears improved with uncapped samples supporting only two conduction paths, one of which may be associated with transport outside of the δ -layer, the other low transport within the δ -layer complex diamond structures. Introduction of the capping layer creates a third conduction path associated with unwanted boron in the capping layer- δ -layer interface.

Original languageEnglish
Article number103707
JournalJournal of Applied Physics
Volume106
Issue number10
DOIs
StatePublished - 2009

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