Hall Effect Measurements of Surface Conductive Layer on Undoped Diamond Films in NO₂ and NH₃ Atmospheres

Abstract

The semiclassical approximation is extended to the case of ionisation of atoms by relativistic charged particles. The theory is formulated both for a relativistic and a non-relativistic electron description. For total cross sections the theory is shown to be equivalent to the relativistic plane-wave Born approximation. Numerical results for the impact parameter distribution of the ionisation probability for the K shell are given.

Surface science of diamond: Familiar and amazing

“…Although the data presented by the two groups are virtually identical they are interpreted as a confirmation of sub-surface hydrogen acceptors by Kimura et al and as ruling out such acceptors by Bergmaier et al A more severe challenge of the sub-surface hydrogen acceptor model was, however, that, in spite of numerous attempts by density functional calculations, no plausible hydrogen-related point defect showing a shallow acceptor level could be identified. In this situation, Maier et al [38], based on own experiments and earlier results by Ri et al [39], could show that also for the conductivity of intrinsic diamond observed under ambient conditions hydrogen termination of the surfaces was only one necessary condition, and that also in that case a surface transfer doping mechanism deliverers the hole accumulation, based on atmospheric surface acceptors.…”

“…The electrochemical surface transfer doping mechanism explains convincingly the creation and the response of surface conductivity in different (gaseous) atmospheres as a function acidity and humidity [39,45]. Since it is based on electrochemical potentials as the driving force for electron transfer, it straight forward to apply the model also to the ion response of chemical sensors in (liquid) electrolytes based on the surface conductivity of hydrogenated diamond, especially to pH sensitivity.…”

Low-Temperature Transport Properties of Holes Introduced by Ionic Liquid Gating in Hydrogen-Terminated Diamond Surfaces

“…7) Some studies were carried out on the surface conductivity of hydrogen-terminated diamonds at low temperatures. [8][9][10][11][12][13] However, there were no systematic measurements on the dependence of mobility on temperature and carrier density at low temperatures.…”

Surface Chemistry of Diamond

“…Another mechanism, including an atmospheric environment, was proposed by Maier et al [60] Supporting result were shown by Ri et al [61] , which were later confirmed by Foord et al [62], and Vittone et al [63]. According to this proposed mechanism, an H-terminated diamond surface requires an atmospheric adlayer for p-type surface conductivity to occur.…”