Professor T. Takahashi -- Discovery of a new topological material --


-Significant progress toward the development of next generation energy-saving devices-

The research group consisting of Associate Professor Takafumi Sato of the Graduate School of Science, Tohoku University; Professor Yoichi Ando, The Institute of Scientific and Industrial Research, Osaka University; and Professor Takashi Takahashi, Advanced Institute for Material Research, Tohoku University, has established that tin telluride (SnTe) semiconductors, which has been studied as ordinary narrow-gap semiconductor for over 40 years, is a completely new type of topological material. The research group found that SnTe bears a topological current protected in a enewf principle essentially different from the known topological materials. This achievement would contribute to developing the materials to be utilized in spintronic technology underlying the next-geaneration energy-saving devices.

The research results have been published onine in Nature Physics on September 30, 2012 (GMT).

More information (Japanese)


Associate Professor Takafumi Sato
Graduate School of Science, Tohoku University
TEL: +81-22-795-6477

Professor Takashi Takahashi
Advanced Institute of Materials Research, Tohoku University
Tel: +81-22-795-6417