Abstract
We investigate the effect of surface termination on the charge state of nitrogen-vacancy (NV) centers, which have been ion-implanted a few nanometers below the surface of diamond. We find that, when changing the surface termination from oxygen to hydrogen, previously stable NV centers convert into NV and, subsequently, into an unknown nonfluorescent state. This effect is found to depend strongly on the implantation dose. Simulations of the electronic band structure confirm the disappearance of NV in the vicinity of the hydrogen-terminated surface. The band bending, which induces a -type surface conductive layer, leads to a depletion of electrons in the nitrogen-vacancies close to the surface. Therefore, hydrogen surface termination provides a chemical way to control the charge state of nitrogen-vacancy centers in diamond. Furthermore, it opens the way to electrostatic control of the charge state with the use of an external gate electrode.
- Received 3 December 2010
DOI:https://doi.org/10.1103/PhysRevB.83.081304
©2011 American Physical Society
Synopsis
Chemical manipulation of nitrogen-vacancy centers in diamond
Published 15 February 2011
Surface termination is used to chemically control the state of nitrogen-vacancy centers in diamond.
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