Description du projet
Une nouvelle technologie d’imagerie pour le transport électronique à l’échelle nanoscopique
Le développement de l’électronique moderne et des dispositifs de communication repose sur les divers effets physiques produits par le transport électronique dans les nanostructures et les films minces. Le processus standard d’analyse du transport électronique ne fournit cependant pas d’informations sur la distribution du courant à l’échelle nanométrique dans de telles structures. Le projet IMAGINE, financé par l’UE, utilisera la microscopie magnétique sensible pour atteindre la distribution existante dans les nanostructures avec une résolution spatiale d’environ 15 nm. La méthode s’appuie sur la récente technique de magnétométrie à balayage à base de diamant, qui exploite la métrologie quantique pour atteindre une sensibilité très élevée et a récemment permis une analyse passive approfondie des surfaces magnétiques. Le projet entend développer une technologie fiable et innovante pour l’imagerie non invasive du transport électronique dans les nanostructures.
Objectif
Electronic transport in nanostructures and thin films shows a rich variety of physical effects that have been fundamental to the development of modern electronics and communication devices. The standard method for investigating electronic transport – resistance measurements – does not provide any information on the nanoscale current distribution in such structures. The lack of spatial information is unfortunate, because the current distribution plays a key role in many intriguing physical phenomena. Having a technique at hand that could simply look at nanoscale current flow would be immensely valuable.
In this project we propose to exploit sensitive magnetic microscopy to directly access the current distribution in nanostructures with ~15nm spatial resolution. Our approach is based on the recent technique of scanning diamond magnetometry (SDM), a scanned-probe method that utilizes a single spin in a diamond tip as a high-resolution sensor of magnetic field. Conceived in 2008 by the PI, SDM exploits quantum metrology to achieve very high sensitivities, and has recently enabled a breakthrough in the passive analysis of magnetic surfaces. Our proposal has three objectives: (i) Lay the instrumental and conceptual groundwork required for imaging tiny (<10nA) current variations in two-dimensional conductors. (ii) Demonstrate imaging of a variety of mesoscopic transport features on a well-established model system: Mono- and bilayer graphene. (iii) Explore the potential of our technique for probing electronic properties beyond transport, like phase transitions and photoexcitation.
Together, our experiments are designed to establish a powerful new technology for imaging current distributions non-invasively and with nanometer spatial resolution. This capability will provide the unique opportunity for directly looking at electronic transport in nanostructures, with a potentially transformative impact on condensed matter physics, materials science and electrical engineering.
Champ scientifique
- natural sciencesphysical sciencescondensed matter physics
- engineering and technologynanotechnologynano-materialstwo-dimensional nanostructuresgraphene
- natural sciencesphysical sciencesopticsmicroscopy
- engineering and technologymaterials engineeringcoating and films
- engineering and technologyelectrical engineering, electronic engineering, information engineeringelectrical engineering
Programme(s)
Régime de financement
ERC-COG - Consolidator GrantInstitution d’accueil
8092 Zuerich
Suisse