In our laboratory, we synthesize high-quality thin film samples using molecular beam epitaxy, and explore functional quantum responses such as energy-dissipationless quantum transport and spintronics properties that manipulate magnetized spins with electric currents on surfaces and interfaces. In particular, we focus on topological quantum materials, such as topological insulators, Weyl semimetals and Rashba semiconductors, which exhibit characteristic band and/or spin structures due to crystal symmetry and band inversion. In sample synthesis, we control the chemical composition of materials, construct hetero-interfaces by stacking different materials, and develop and design samples using various methods to realize and elucidate new physical phenomena.

RYOUTARO yoshimi LAB. research



RYOUTARO yoshimi LAB. research



RYOUTARO yoshimi LAB. research



RYOUTARO yoshimi LAB. research




The thrill of being a researcher is being able to investigatetopics of interest at one's own discretion.
It's precisely because the themes are challenging and requirea battle with the world that I felt compelled to take them on.

As a child, I enjoyed crafting and art. In junior high and high school, I joined the geoscience club and collected rare stones and fossils outdoors. It was fun to discover things like shark teeth and quartz.
My research topic, topological insulators, has been a focus since my senior year in college. It was a truly novel area of study at the time, with intense research and competition worldwide. It was a challenging endeavor, with the potential for great success if results were achieved, but nothing if someone else beat you to it. This motivated me to take on the challenge. As a result, I was able to achieve good results, which have led me to where I am today. It's not just about working alone; it's about consulting with others, trying repeatedly, and focusing on experiments over and over again. Sometimes, by paying attention to the sudden feeling that "something is off" and observing it, you can find areas for improvement.


Professor RYOUTARO yoshimi

Associate Professor RYOUTARO yoshimi

2011 B.Eng., in Dept. of Applied Physics, University of Tokyo

2016 Ph.D(Eng.), in Dept. of Applied Physics, University of Tokyo

2016-2019 Special Postdoctoral Researcher, Center for Emergent Matter Science, RIKEN

2020-2024 Research Scientist, Center for Emergent Matter Science, RIKEN

2024 Associate Professor, Dept. of Advanced Materials Science, University of Tokyo

Visiting laboratory

  • +81-4-7136-3752
  • RYOUTARO yoshimi Lab.,
  • Department Of Advanced Materials Science,
  • Graduate School of Frontier Sciences,
  • The University of Tokyo
  • Kashiwanoha 5-1-5,
  • Kashiwa,Chiba 277-8561, Japan