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TT: Fachverband Tiefe Temperaturen
TT 103: Transport: Poster Session
TT 103.22: Poster
Donnerstag, 19. März 2015, 15:00–18:00, Poster B
Towards a room temperature 2D quantum platform on diamond — •Nathan Chejanovsky1,2 and Jörg Wrachtrup1,2 — 13rd Physics Institute and Research Center SCoPE, University of Stuttgart, 70569 Stuttgart, Germany — 2Max Planck Institute for Solid State Research, 70174 Stuttgart, Germany
The nitrogen vacancy (NV) in diamond has been on the fore front of research for room temperature quantum computation applications. Polarization of nuclear spins using the NV center electron spin as a quantum bus for read/write has been demonstrated [1]. For material residing on top of the diamond lattice, a suitable platform is needed for nuclei spin polarization. It has been proposed that graphene, covalently bonded to other non-zero spin nuclei, could be a starting point for this platform [2]. However, graphene alone contains a zero band gap which quenches the NV- state, rendering it useless for optical read out.
We propose here a different approach using 2D hexagonal boron-nitride (h-BN) monolayer instead. These monolayers have shown a band gap from 4.6 to 7.0 eV [3]. In addition, all atoms composing the monolayer already have none zero spin: Boron*s isotope natural abundance is 80.1% spin 3/2 and 19.9% spin 3, for Nitrogen the abundance is 99.6% spin 1 and 0.4% spin 1/2. These properties make h-BN an excellent choice for a starting ’playground’ platform for NV controlled quantum applications.
[1] Taminiau, T. H. et al. Nature Nanotechnology 9, 171-176 (2014)
[2] Cai, J. et al. Nature Physics 9, 168-173 (2013)
[3] Nagashima, A. et al. Physical Review B 51, 4606-4613 (1995).