Journal article

Raman investigation of damage caused by deep ion implantation in diamond

JO Orwa, KW Nugent, DN Jamieson, S Prawer

PHYSICAL REVIEW B | AMER PHYSICAL SOC | Published : 2000

Abstract

Raman microscopy has been employed to investigate the nature of damage created when natural type-IIa diamond is irradiated with MeV alpha particles. Three features appear in the Raman spectrum due to damage, viz., (i) the first-order diamond Raman line is broadened and downshifted, (ii) broad features appear which are a measure of the vibrational density of states of ion-beam-amorphized diamond, and (iii) the damage causes the appearance of sharp defect-induced Raman peaks at 1490 and 1630 cm-1. For damage below an amorphization threshold, a linear relationship exists between the full width at half maximum and frequency shift, which shows that these are Kramers-Kronig related. The annealing ..

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