Surface Physics

Research

Surface Physics

Overview

photo

UHV graphene growth
and RHEED/LEED system

We are pursuing the correlations of nanostructures of solid state matters (graphene and group III nitrides), grown on hetero-surfaces of SiC or sapphire, with physical properties such as electronic band structures. A base idea is to controll the surface nanostructures and superstructures, which are self-organized, and to grow nanostructures of hetero-matters onto such surfaces. We recently focus on graphene, which is a new hero of the solid state physics after Nobel Prize in Physics 2010 by Profs. Geim and Novoselov, by way of SiC surface decomposition. Epitaxial graphene grown on SiC surface nanostructures with variety of structural parameters (vicinality, periodicity, polarity, etc..) can be modified in terms of morphology, interface structures and dimensions into ripples, nanoribbons and dots. Accordingly, the physical characteristics of such modified graphene nanostructures are theoretically predicted anomalous and unique. For example, the high density of edge states of graphene nanoribbons may appear at Dirac points. We thus explore the correlations of such graphene nanostructures, e.g. nanoribbons, periodic ripples, and edges, with their physical properties like eletronic, phonon, and optical characteristics.

Staff

Professor Satoru Tanaka
Assistant Professor Anton Visikovskiy

The Main Research Topics

  • Growth mechanisms of epitaxial graphene on SiC surfaces
  • Correlations of graphene nanostructures with their physical properties
  • Electronic and phonon structures of graphene edges
  • Crystal growth of III-nitrides
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