Regensburg 2022 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 29: Transport: Poster Session

TT 29.3: Poster

Donnerstag, 8. September 2022, 15:00–18:00, P1

A carbon-nanotube nanoelectromechanical system coupled to a single-molecule magnet — •Aljoscha Auer, Svenja Müller, Tim Althuon, Tino Cubaynes, and Wolfgang Wernsdorfer — Karlsruher Institut für Technologie, 76131 Karlsruhe

The one-dimensional structure of carbon nanotubes (CNTs) as well as their low weight and high Young*s modulus make them an excellent candidate for nanoelectromechanical systems (NEMS). With their mechanical resonance frequency in the hundreds of MHz regime combined with a large quality factor they are suited for high sensitivity experiments. In addition, the conductivity of CNTs can be tuned nicely by applying an electric field tuning the energy levels of charge carriers. For our experiments we want to use a suspended, top-down fabricated carbon nanotube, grown by chemical vapour deposition connecting two electrodes or using a stamping technique where the CNT is grown on a separate chip. Five local gates below the suspended nanotube enable us to manipulate the system by application of a tunable electric field. Furthermore, we want to attach a single-molecule magnet (SMM) to the nanotube by thermal evaporation, therefore creating a system using spin-phonon-coupling to address a single individual spin. The possible measurements in this configuration are manifold, ranging from magnetoresistive effects, spin valves respectively, and double quantum dot transport measurements to electron-phonon coupling measurable in transport measurements in a mechanical resonator.