Akiyama Ryota
Assistant Professor
Department of Physics (UG), Department of Physics (GR), Grad
University of Tokyo
Japan
Biography
AKIYAMA Ryota is currently working as Assistant Professor under Department of Physics (UG), Department of Physics (GR), Graduate School of Science
Research Interest
Atomic arrangement structures, electronic states, electronic transport, and other quantum effects which are characteristic to artificial ‘ nano-scale structures ’ having dimensions around single-atomic thick, single-atomic wide, and single-atomic sizes. These nanometer-scale structures are fabricated by controlling ‘ surface superstructures’ formed on semiconductor crystal surfaces. Together with exploring the suitable structures and their fabrication conditions/procedures, various kinds of experimental techniques in ultrahigh vacuum, such as scanning tunneling microscopy/spectroscopy, electron microscopy/diffraction, photoemission spectroscopy, four-point probe methods, are utilized with making efforts for developing unique techniques. Topics are atomic arrangement structures, phase transitions in low dimensions, Fermiology, dynamical phenomena such as mass transport, adsorption, desorption and atomic layer growth, electronic transport properties, quantum size effects, and so on.
Publications
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R. Akiyama, K. Sumida, S. Ichinokura, A. Kimura, K. Kokh, O. Tereshchenko, and S. Hasegawa: Shbunikov-de Haas oscillations of p and n-type topological insulator (BixSb1-x)2Te3 Phys. Rev. B, submitted. arXiv
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T. Hirahara, S. V. Eremeev, T. Shirasawa, Y. Okuyama, T. Kubo, R. Nakanishi, R. Akiyama, A. Takayama, T. Hajiri, S. Ideta, M. Matsunami, K. Sumida, K. Miyamoto, Y. Takagi, K. Tanaka, T. Okuda, T.Yokoyama, S. Kimura, S. Hasegawa, and E. V. Chulkov: A large-gap magnetic topological heterostructure formed by subsurface incorporation of a ferromagnetic layer Nano Letters 17, 3493-3500 (May, 2017) Press Release　科å¦æ–°èž [Times Cited 0]
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R. Akiyama, Y. Takano, Y. Endo, S. Ichinokura, R. Nakanishi, K. Nomura, and S. Hasegawa: Berry phase shift from 2π to π in Bilayer graphene by Li-intercalation and sequential desorption Appl. Phys. Lett. 110, 233106 (Jun, 2017) [Times Cited 0]
