2010/11/30 by M. V. Hauf, Moritz V. Hauf, Bernhard Grotz +18 · 5 citations
Chemistry · Engineering · Materials Science · Physics and Astronomy · #Atomic physics #Band bending #Charge (physics) #Chemical physics #Chemical state #Chemistry #Crystallography #Diamond #Diamond and Carbon-based Materials Research #Electron #Electronic and Structural Properties of Oxides #Hydrogen #Ion #Layer (electronics) #Materials science #Nanotechnology #Nitrogen #Optoelectronics #Physical chemistry #Physics #Semiconductor materials and devices #Surface (topology) #Surface charge #Surface layer #Surface states #Vacancy defect #X-ray photoelectron spectroscopy #cond-mat.mtrl-sci #quant-ph
paper · pdf · doi:10.1103/physrevb.83.081304
12 pages, 4 figures
arxiv created 2010/12/15 · openalex publication_date 2011/02/14 · arxiv updated 2013/05/29 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
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^\ensuremath- centers convert into NV0 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^\ensuremath- in the vicinity of the hydrogen-terminated surface. The band bending, which induces a p-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.