Tuesday, May 21, 2013

1305.4234 (Shintaro Ishiwata et al.)

Optimal Tc for Electron-Doped Cuprate Realized under High Pressure    [PDF]

Shintaro Ishiwata, Daichi Kotajima, Nao Takeshita, Chieko Terakura, Shinichiro Seki, Yoshinori Tokura
The race to obtain a higher critical temperature (Tc) in the superconducting cuprates has been virtually suspended since it was optimized under high pressure in a hole-doped trilayer cuprate. We report the anomalous increase in Tc under high pressure for the electron-doped infinite-layer cuprate Sr0.9La0.1CuO2 in the vicinity of the antiferromagnetic critical point. By the application of a pressure of 15 GPa, Tc increases to 45 K, which is the highest temperature among the electron-doped cuprates and ensures unconventional superconductivity. We describe the electronic phase diagram of Sr1-xLaxCuO2 to discuss the relation between the antiferromagnetic order and superconductivity.
View original: http://arxiv.org/abs/1305.4234

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