title: Probing surface noise with depth-calibrated spins in diamond.
abstract: Sensitive nanoscale magnetic resonance imaging of target spins using nitrogen-vacancy (NV) centers in diamond requires a quantitative understanding of dominant noise at the surface. We probe this noise by applying dynamical decoupling to shallow NVs at calibrated depths. Results support a model of NV dephasing by a surface bath of electronic spins having a correlation rate of 200 kHz, much faster than that of the bulk N spin bath. Our method of combining nitrogen delta-doping growth and nanoscale depth imaging paves a way for studying spin noise present in diverse material surfaces.
authors: Department of Physics, University of California, Santa Barbara, California 93106, USA.
authors: B A
authors: BA
authors: Myers
authors: Department of Physics, University of California, Santa Barbara, California 93106, USA.
authors: A
authors: A
authors: Das
authors: Department of Physics, University of California, Santa Barbara, California 93106, USA.
authors: M C
authors: MC
authors: Dartiailh
authors: Department of Physics, University of California, Santa Barbara, California 93106, USA.
authors: K
authors: K
authors: Ohno
authors: Department of Physics, University of California, Santa Barbara, California 93106, USA and Institute for Molecular Engineering, University of Chicago, Chicago, Illinois 60637, USA.
authors: D D
authors: DD
authors: Awschalom
authors: Department of Physics, University of California, Santa Barbara, California 93106, USA.
authors: A C
authors: AC
authors: Bleszynski Jayich