Professor

Tadahiro Komeda

Senior Assistant Professor

Tsuyoshi Takaoka

Single spin detection and manipulation for molecule-spintronics

The detection of a single spin is demanded for variety of applications, e.g., for reading and manipulation of isolated spins for spintronics and quantum computation. We are developing instrumentation of the detection of a single spin using scanning tunneling microscope (STM).
Especially, a method that detects the Larmor precession by monitoring a variation of tunneling current, called ESR-STM, has a large advantage due to its compatibility with solid devices and atom-scale spatial resolution. We successfully developed ESR-STM instrument which can detect the single spin in SiO layers.
In addition, for the realization of the molecular-spintronics, single molecule magnet (SMM) is one of the most promising material. We investigated the spin of SMM by detecting Kondo states. We found that the Kondo peak intensity shows a clear variation with the conformational change of the molecule; namely the azimuthal rotational angle of the Pc planes.

Themes

• Observation and chemical characterization of single molecule using scanning tunneling microscope (STM)
• Chemical analysis using molecule vibration and spin detection with an atomic resolution
• Interface engineering to combine Si technology and molecule electronics
• Spin control for molecule spintronics and quantum computing
• Molecule-surface interaction dynamics for environmental catalysis resear