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.
@article{arxiv.1305.4234,
title = {Optimal Tc for Electron-Doped Cuprate Realized under High Pressure},
author = {Shintaro Ishiwata and Daichi Kotajima and Nao Takeshita and Chieko Terakura and Shinichiro Seki and Yoshinori Tokura},
journal= {arXiv preprint arXiv:1305.4234},
year = {2013}
}