Acousto-electric modulation of epitaxial graphene

Research Topic

Graphene is a novel two-dimensional material with very good electronic transport properties. The modulation of graphene by surface acoustic waves can gives rise to new phenomena, which can lead to devices such as acoustic switches and electron beam super-collimators.


The main goal of this project is to modulate the carrier transport in graphene with surface acoustic waves. The synthesis and characterization of epitaxial graphene, fabrication of gated graphene devices, and the fabrication of ultra-high frequency interdigital transducers are the primary goals of the work. After that, SAWs will be applied to induce carriers transport (acousto-electric current) as well as to modulate the band structure of graphene.


Yi-Ting Liou

Host: Paul-Drude-Institut für Festkörperelektronik Berlin

Scientific Background

I studied Materials Science and Engineering in National Taiwan University, and obtained my Bachelor and Master Degree in 2012 and 2014, respectively. During my Master’s study I worked on graphene-based devices, such as photovoltaics and phototransistors. In addition to device fabrication, I also have experiences on graphene growth and characterization.

Conference/Workshop Contributions
    • Acoustoelectric transport in ZnO/MgO- covered graphene on silicon carbide
      Y.-T. Liou, A. Hernández-Mínguez, J. Herfort, J. M. Lopes, A. Tahraoui, P. V. Santos
      SAWtrain Summer School: Physics and applications of GHz vibrations in semiconductors (Cargèse, France, Jul. 11-21, 2017) | Internal
Conference/Workshop Contributions
    • Anisotropic Conductivity in Graphene induced by Surface Acoustic Waves
      Y.-T. Liou
      Spice workshop: Quantum Acoustics meet Surface Acoustic Waves meets Solid State Qubits (Mainz, Germany, May 17-20, 2016) | Internal
    • Modulation of Graphene Electronic Properties by High- frequency Surface Acoustic Waves
      Y.-T. Liou, A. Hernández-Mínguez, J. M. Lopes, A. Tahraoui, P. V. Santos
      4th SPP 1459 Graphene Workshop (Chemnitz, Germany, Sep. 25-29, 2016) | Internal