Emergent Device Research Team

The purpose of the Emergent Device Team is to make revolutionary contribution to the low energy consumption electronics through creating novel quantum properties and functions based on devices made by heterointerfaces between inorganic and organic materials. The former includes semiconductors, metals, oxides, and chalcogenides, while the latter includes ionic liquids, self-assembled monolayers, and conjugated polymers. In particular, we focus on filed effect phase control such as electric field induced superconductivity, Mott transistor, electric field manipulation of spin current, and novel thermoelectric materials.

Research Fields

Physics / Engineering / Materials Sciences

Research Subjects

• Field Effect Phase Control and its Applications
• Fabrication and Properties of Organic-Inorganic Interfaces
• Topological quantum transport

Publications

1. Ye, J. T., Zhang, Y. J., Akashi, R., Bahramy, M. S., Arita, R., and Iwasa, Y.:
   "Superconducting Dome in a Gate-Tuned Band Insulator."
   Science 338, 1193 (2012).
2. M. Nakano, K. Shibuya, D. Okuyama, T. Hatano, S. Ono, M. Kawasaki, Y. Iwasa, and Tokura Y.:
   "Collective bulk carrier delocalization driven by electrostatic surface charge accumulation."
   Nature 487, 459-462 (2012).
3. Checkelsky, J. G., Ye, J. T., Onose, Y., Iwasa, Y., and Tokura, Y.:
   "Dirac Fermion Mediated Ferromagnetism in a Topological Insulator."
   Nature Physics 8, 729 (2012).
4. Shimizu, S., Yoshimi, R., Hatano, T., Takahashi, K. S., Tsukazaki, A., Kawasaki, M., Iwasa, Y., and Tokura, Y.:
   "Gate control of surface transport in MBE-grown topological insulator (Bi_1-xSb_x)₂Te₃ thin films."
   Physical Review B 86, 045319 (2012).
5. Hwang, H. Y., Iwasa, Y., Kawasaki, M., Keimer, B., Nagaosa, N., and Tokura, Y.:
   "Emergent phenomena at oxide interfaces."
   Nature Materials, 11, 103-113 (2012).
6. Ye, J. T., Craciun, M. F., Koshino, M., Russo, S., Inoue, S., Yuan, H. T., Shimotani, H., Morpurgo, A. F., and Iwasa, Y.:
   "Accessing the transport properties of graphene and its multilayers at high carrier density."
   Proceedings of the National Academy of Sciences of the United States of America, 108, 13002-13006 (2011).
7. Yamada, Y., Ueno, K., Fukumura, T., Yuan, H. T., Shimotani, H., Iwasa, Y., Gu, L., Tsukimoto, S., Ikuhara, Y., and Kawasaki, M.:
   "Electrically induced ferromagnetism at room temperature in cobalt-doped titanium dioxide."
   Science, 332, 1065-1067 (2011).
8. Ueno, K., Nakamura, S., Shimotani, H., Yuan, H. T., Kimura, N., Nojima, T., Aoki, H., Iwasa, Y., and Kawasaki, M.:
   "Discovery of superconductivity in KTaO3 by electrostatic carrier doping."
   Nature Nanotechnology 6, 408-412 (2011).
9. Ye, J. T., Inoue, S. Kasahara, Y., Yuan, H. T., Shimotani H., and Iwasa, Y.:
   "Liquid gated interface superconductivity in an atomically flat film,"
   Nature Materials 9, 125-128 (2010).
10. Ueno, K., Nakamura, D., Shimotani, H., Ohtomo, A., Kimura, N., Nojima, T., Aoki, H., Iwasa, Y., and Kawasaki , M.:
    "Electric-field-induced superconductivity in an insulator"
    Nature Materials 7, 855-858 (2008)