Quantum Phenomena Observation Technology Team

Team Leader

Hyun Soon Park

  • Ph.D.
  • Hyun Soon Park

Outline

Quantum Phenomena Observation Technology Team

Our team studies quantum phenomena that appear in topological structures such as in nano-magnetic materials. We develop measuring technologies that enable us to observe quantum phenomena at high phase resolutions under controlled electric and magnetic fields at the nanometer scale. We do this mainly employing world-brightest electron beam interference technologies such as electron holography and Lorentz microscopy, in addition to low temperature cryogenic, magnetic field control and electron field control technologies. We observe local electric and magnetic fields at nanoscopic dimensions including spintronics phenomena such as giant spin accumulations and topological magnetic materials, and vortices in high-Tc superconductors using these electron wave interference technologies.

Recent Research Topic

Generation of electron beams carrying orbital angular momentum
Fig. 1: Generation of electron beams carrying orbital angular momentum
Left: Creation of a spiral-type wave carrying angular momentum.
Right: Experimental set-up and electron interference pattern (hologram).
Fig. 1
Reproduced, with permission, from M. Uchida, A. Tonomura, Generation of electron beams carrying orbital angular momentuam, Nature 2010, 464, 737. © (2012) Macmillan Publishers Ltd: Nature

Selected Publications

  1. M. Uchida, A. Tonomura, Generation of electron beams carrying orbital angular momentum, Nature 2010, 464, 737.
  2. W. X. Xia, et al. Investigation of magnetic structure and magnetization process of yttrium iron garnet film by Lorentz microscopy and electron holography, J. Appl. Phys. 2010, 108, 123919.
  3. H. Batelaan, A. Tonomura, The Aharonov-Bohm effects: Variations on a subtle theme, Phys. Today 2009, 62, 38.
  4. A. Tonomura, Development of electron phase microscopes, Nuclear Instrum. Methods in Physics Research A 2009, 601, 203.
  5. Y. Togawa, et al. Current-excited magnetization reversal under in-plane magnetic field in a nanoscaled ferromagnetic wire, Appl. Phys. Lett. 2008, 92, 012505.
  6. A. Tonomura, F. Nori, Disturbance without the force, Nature 2008, 452, 298.
  7. M. Uchida, et al. Topological spin textures in the helimagnet FeGe, Phys. Rev. B 2008, 77, 184402.
  8. A. Tonomura, Development of electron holography and its applications to fundamental problems in physics, Jpn. J. Appl. Phys. 2008, 47, 11.
  9. A. Tonomura, Quantum phenomena visualized by electron waves, Int. J. Modern Physics B 2007, 21, 5291.
  10. Y. Togawa, et al. Current-excited magnetization dynamics in narrow ferromagnetic wires, Jpn. J. Appl. Phys. 2006, 45, L683.

Core Members

Principal Investigator add delete
Hyun Soon Park Team Leader    
Staff Scientist add delete
Postdoctoral Fellow add delete
Toshiaki Tanigaki Contract Researcher    
Takahiro Suzuki Postdoctoral Researcher    
Student Trainee add delete
Technical Assistant add delete
Shinji Aizawa Technical Staff I    
Administrative Assistant add delete
Visiting Research Staff add delete
Other Staff add delete
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