Pure spin pumping in 2d van der Waals materials

During my internship, I worked with the TELEM group in the laboratory Matériaux et phénomènes quantiques who masters the nanofabrication of 2d van der Waals hetero-structures. Previous works have already been done regarding this class of materials. For instance, a spin field effect transistor in WSe2 has been investigated and has reported very encouraging results. In this perspective, the efforts have been pursued towards the characterization of the basic spin transport properties into 2d van der Waals materials to the aim of contributing to the development of spin logic devices. In particular,my work has been focused on a developing a completely new spin injection method for our group, namely spin pumping. Efficient spin injection is the first crucial step in order to implement effective new spintronic devices. As a first experiment, it has been decided to try to reproduce a recent experiment, made in Christian Schönenberger group recently, where pure spin currents have been injected in graphene through FMR based spin pumping and detected through the ISHE [18]. I have been in charge of settling this completely new experiment from scratch. I will present my work on designing the devices and developing their nanofabrication. Finally, preliminary data of FMR on Cobalt thin films will be presented at the end of the report.