Hydrogen-functionalized graphene (nanomesh) spintronics and magnetism

International Conference and Exhibition on Mesoscopic & Condensed Matter Physics

June 22-24, 2015 Boston, USA

Junji Haruyama

Aoyama Gakuin University, Japan

Posters-Accepted Abstracts: J Material Sci Eng

Abstract :

Graphene, a carbon mono-atomic layer, is still attracting significant attention even after awarding Nobel Prize at 2010. In particular, strong spin coherence has been highly expected in graphene because of the weak spin-orbit interaction (SOI) and weak hyperfine interaction, which are unique to carbon atoms. In the talk, I will show the following some of our latest experimental results about hydrogen(H)-functionalized graphene spintronics and magnetism; (1) Observation of spin Hall Effect (SHE) arising from SOI introduced by slight H-functionalization and its strong correlation with induced spin coherence, (2) Significant improvement of spontaneous spin polarization and flat band ferromagnetism (mostly 100-times greater) arising from nano-pore edge spins in graphene nanomesh (GNM) magnets realized by effective pore-edge-H termination using HSQ resist, and (3) Tunnel magneto resistance structure using the ferromagnetic GNM (FGNM) as an electrode for future rare-metal free spintronics. These results must open doors to rare-metal free (all-carbon) spintronics and magnetism.

Biography :

Junji Haruyama is professor of materials science at the Faculty of Science and Technology, Aoyama Gakuin University, Japan. He graduated from Waseda University, Tokyo, Japan, in 1985, after which he joined NEC Corporation, Japan. He received his PhD in physics from Waseda University in 1996. During 1995–1997, he worked with the University of Toronto, Canada, and Ontario Laser and Lightwave Research Center, Canada, as a visiting scientist. Then he was a visiting professor at NTT Basic Research Laboratories, Japan, and the Institute for Solid State Physics, the University of Tokyo, Japan. Currently, he is also a principal researcher for a grant by the Air-Force Office of Scientific Research, USA, for a project on carbon-based high-Tc superconductivity. He has authored over 30 books and over 100 peer-reviewed articles in international journals, including Physical Review Letters and Nature Nanotechnology. He has been honored with many grants by the Japan Science and Technology agency, the Japan Society for the Promotion of Science, and the Ministry of Education, Culture, Sports, Science and Technology of Japan.

Email: j-haru@ee.aoyama.ac.jp