Graphène CVD macroscopique en régime de supraconductivité de proximité: applications à l'électronique flexible et radiofréquence

par Pauline Ronseaux

Projet de thèse en Physique de la Matière Condensée et du Rayonnement

Sous la direction de Vincent (phys) Bouchiat et de Julien Renard.

Thèses en préparation à Grenoble Alpes , dans le cadre de Physique , en partenariat avec Institut Néel (laboratoire) depuis le 23-09-2015 .


  • Résumé

    The electronic properties of graphene, a monolayer of graphite, are relatively well understood in the DC regime after 10 years of active research. Nevertheless its properties in the high- frequency limit (above 1 GHz for instance) have only recently been highlighted. Its unique geometry (purely 2D) combined with an exceptional charge carrier mobility make graphene a wonder material to realize new devices working in this microwave limit. The observation of new physical phenomena in such devices is the aim of this thesis. First, the realization of radiofrequency cavities containing superconducting graphene will be carried out. Graphene can indeed be made superconducting using superconducting islands. This is a know-how of the laboratory that is unique in the world [All12,Han14]. Besides a better understanding of superconductivity in this new system, we expect to be able to strongly tune the resonance frequency of the cavity by changing the kinetic inductance of the superconducting graphene with a gate voltage. A second part of the thesis will aim at creating a superconducting flexible film based on graphene. The work will be mainly experimental. It will include nanofabrication and electrical measurements in cryogenic conditions.

  • Titre traduit

    Proximity superconducting macroscopic CVD graphene : application from flexible electronics to radiofrequency


  • Résumé

    The electronic properties of graphene, a monolayer of graphite, are relatively well understood in the DC regime after 10 years of active research. Nevertheless its properties in the high- frequency limit (above 1 GHz for instance) have only recently been highlighted. Its unique geometry (purely 2D) combined with an exceptional charge carrier mobility make graphene a wonder material to realize new devices working in this microwave limit. The observation of new physical phenomena in such devices is the aim of this thesis. First, the realization of radiofrequency cavities containing superconducting graphene will be carried out. Graphene can indeed be made superconducting using superconducting islands. This is a know-how of the laboratory that is unique in the world [All12,Han14]. Besides a better understanding of superconductivity in this new system, we expect to be able to strongly tune the resonance frequency of the cavity by changing the kinetic inductance of the superconducting graphene with a gate voltage. A second part of the thesis will aim at creating a superconducting flexible film based on graphene. The work will be mainly experimental. It will include nanofabrication and electrical measurements in cryogenic conditions.