A research group of Graduate student Tomohisa Takamatsu, Associate Professor Masatsune Kato and Professor Yoji Koike at Graduate School of Engineering, Tohoku University has discovered a new superconductor of copper oxide with the T'-type crystal structure. In the copper oxides with the T’-type crystal structure, it has been long believed that superconductivity appears through the electron-doping. In this study, however contrarily to established beliefs, superconductivity was achieved through the removal of electrons (doping of holes). It was believed that the mechanism of superconductivity through the electron-doping was completely different from that through the hole-doping. As a result of this study, a unified explanation may now be possible and will hopefully provide crucial information to understand the mechanism of high temperature superconductivity in copper oxides. The results of this study will be published in Applied Physics Express vol.5 (2012) Number 7.

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Associate Professor Masatsune Kato

Department of Applied Physics, Tohoku University

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