TY - JOUR T1 -

Spectroscopy of surface-induced noise using shallow spins in diamond

JF - Phys. Rev. Lett. Y1 - 2015 A1 - Y. Romach A1 - C. Muller A1 - T. Unden A1 - L. J. Rogers A1 - T. Isoda A1 - K. M. Itoh A1 - Markham, M A1 - Stacey, A A1 - J. Meijer A1 - S. Pezzagna A1 - B. Naydenov A1 - L. P. McGuinness A1 - Bar-Gill, N A1 - F. Jelezko AB - We report on the noise spectrum experienced by few nanometer deep nitrogen-vacancy centers in diamond as a function of depth, surface coating, magnetic field and temperature. Analysis reveals a double-Lorentzian noise spectrum consistent with a surface electronic spin bath in the low frequency regime, along with a faster noise source attributed to surface-modified phononic coupling. These results shed new light on the mechanisms responsible for surface noise affecting shallow spins at semiconductor interfaces, and suggests possible directions for further studies. We demonstrate dynamical decoupling from the surface noise, paving the way to applications ranging from nanoscale NMR to quantum networks. VL - 114 UR - http://dx.doi.org/10.1103/PhysRevLett.114.017601 ER -