Graphene Nanoribbons: Definitive Spin Switches

When narrow zigzag graphene nanoribbons are connected to form junctions or superlattices, properly placed square-shaped carbon tetragons serve as effective bundles of the incoming spin edge channels and act as definitive topological spin switches for the outgoing channels. Realization of such structures have also been demonstrated experimentally. [More...]

Plasmonics in Graphene Superlattice

The quantum plasmonic properties of 1d graphene superlattices have been explored. It is found that there exists a spectrum of emergent quantum plasmonic effects due to the strong electron-hole pair continuum coupling to the plasmon modes along the superlattice direction. In contrast, the coupling along the perpendicular direction is much weaker, and the plasmonic dispersion remains similar to that of pristine graphene. [More...]

Electronically phase-separated Ground State in Indium Wires

We demonstrate that the incorporation of vacancy defects into monatomic indium wires on n-type Si(111) can stabilize electronically phase-separated ground states where the insulating 8×2 and metallic 4×1 phases coexist. Furthermore, the areal ratio of the two phases in the phase-separated states can be tuned reversibly by electric field or charge doping. [More...]


  • Our paper "Carbon Tetragons as Definitive Spin Switches in Narrow Zigzag Graphene Nanoribbons" has published in Phys. Rev. Lett. 116, 026802 (2016). [14 Jan. 2016]
  • Prof. Guoxing Miao, Dr. Hui Zhang, and Ms. Lin Li from the Institute for Quantum Computing and the Department of Electrical and Computer Engineering at the University of Waterloo, Canada, are now visting our lab. Collaboration between us will be discussed. WELCOME! [27 Jan. 2015]
  • Prof. Hyun-Jung Kim from the Department of Physics at Hanyang University, Korea, is now visting our lab. Further research collaboration between us will be discussed. WELCOME! [21 Jan. 2015]
  • Our NEW website has been launched online. CHEERS! [16 Jan. 2015]