Controlling Phonon Propagation of monolayer graphene by structural defects

November 4, 2016

Takayuki Arie, Osaka Prefecture University

Since phonons are the main heat carrier in carbon nanomaterials, we have been investigating the change in heat transport in the materials by modifying their structures such as isotopic heterostructures [1,2].

Resonant Zener tunnelling via zero-dimensional states in a semiconductor diode

October 11, 2016

Nobuya Mori, Osaka University

We conduct theoretical research based on quantum transport device simulation.  Collaborating with Professors Amalia Patané and Laurence Eaves at the University of Nottingham, we have recently demonstrated a new type of Zener tunnelling that involves the resonant transmission of electrons through zero-dimensional (0D) states in a semiconductor resonant-tunnelling diode (RTD) [1].

Terahertz dynamics of electron transport at single molecule levels

September 21, 2016

Kazuhiko Hirakawa, University of Tokyo

     Electron transport through single molecules has been attracting considerable attention owing to its potential to realize a variety of novel functions for electronics.

Quantum transport in topological insulators

August 3, 2016

Minoru Kawamura, RIKEN

In this project, we aim to develop a novel quantum electronics based on the coupling between spin and orbital motion of electrons in solids. We choose three-dimensional (3D) topological insulators, which have attracted great interests of contemporary materials science, as an ideal laboratory to study the spin-orbit coupling. A 3D topological insulator consists of a bulk insulating state and a conducting surface states which has a linear dispersion relation similar to graphene. Therefore exotic electro-magnetic responses are anticipated due to the relativistic

Phonon Controlling by Phononics

July 1, 2016
Masahiro Nomura, Institute of Industrial Science, the University of Tokyo

In the phonon group, we aim to develop technology which controls the vibrations of the crystal lattice and mechanical structures.