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O: Fachverband Oberflächenphysik

O 16: Scanning probe methods II

O 16.2: Vortrag

Montag, 26. März 2012, 16:15–16:30, MA 043

Development of a Diamond-based Scanning Probe Spin Sensor with sub-nm Spatial Resolution — •Eike Oliver Schäfer-Nolte^1,2, Friedemann Reinhard², Markus Ternes¹, Jörg Wrachtrup², and Klaus Kern¹ — ¹Max-Planck Institut für Festkörperforschung, Stuttgart, Germany — ²3. Physikalisches Institut, Universität Stuttgart, Germany

The detection of single spins with high spatial resolution is a long-standing challenge in physics. The nitrogen-vacancy (NV) center in diamond is one of the few solid-state systems where the spin state can be optically measured [1]. By attaching a nanodiamond containing this "probe spin" to the tip of an atomic force microscope a controlled coupling between the NV and nearby spins on the sample can be achieved, allowing an indirect observation of these spins via the fluorescence signal from the NV [2]. This approach provides an unprecedented sensitivity by exploiting the quantum nature of the NV spin, enabling coherent manipulation by pulsed detection schemes well known from EPR- and NMR-spectroscopy. In this case the sensitivity is limited by the coherence time of the NV, which exceeds 1ms in pure diamond [3]. This corresponds to an energy resolution on the order of kHz.

We report on our efforts developing such a Scanning Probe Spin Sensor and present details of the experimental setup along with first experimental data.

References: [1] F. Jelezko, Phys. Stat. Sol. (a) 203, 3207 (2006) [2] J.M. Taylor, Nature Physics 4, 810 (2008) [3] G. Balasubramanian, Nature Materials 8, 383 (2009)