Physics – Condensed Matter – Materials Science
Scientific paper
2009-02-13
New Journal of Physics 11 (2009) 063007
Physics
Condensed Matter
Materials Science
16 pages, 10 figures; fonts fixed and reference corrected
Scientific paper
10.1088/1367-2630/11/6/063007
The emission intensity of diamond samples containing nitrogen-vacancy centres are measured as a function of magnetic field along a <111> direction for various temperatures. At low temperatures the responses are sample and stress dependent and can be modeled in terms of the previous understanding of the 3E excited state fine structure which is strain dependent. At room temperature the responses are largely sample and stress independent, and modeling involves invoking a strain independent excited state with a single zero field splitting of 1.42 GHz. The change in behaviour is attributed to a temperature dependent averaging process over the components of the excited state orbital doublet. It decouples orbit and spin and at high temperature the spin levels become independent of any orbit splitting. Thus the models can be reconciled and the parameters for low and high temperatures are shown to be consistent.
Armstrong Scott
Manson Neil B.
McMurtrie R. L.
Rogers Lachlan J.
Sellars Matthew J.
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