Optimal T_{\text{c}} for Electron-Doped Cuprate Realized under High Pressure

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概要

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• The race to obtain a higher critical temperature (T_{\text{c}}) 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 T_{\text{c}} under high pressure for the electron-doped infinite-layer cuprate Sr<inf>0.9</inf>La<inf>0.1</inf>CuO<inf>2</inf>in the vicinity of the antiferromagnetic critical point. By the application of a pressure of 15 GPa, T_{\text{c}} 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 Sr<inf>1-x</inf>La<inf>x</inf>CuO<inf>2</inf>to discuss the relation between the antiferromagnetic order and superconductivity.

• 2013-06-15

著者

• Seki Shinichiro

  Department Of Applied Physics University Of Tokyo

• Tokura Yoshinori

  Department Of Applied Physics And Quantum Phase Electronics Center University Of Tokyo

• Takeshita Nao

  Electronics and Photonics Research Institute, National Institute of Advanced Industrial Science and Technology, Tsukuba, Ibaraki 305-8562, Japan

• Ishiwata Shintaro

  Department of Applied Physics and Quantum-Phase Electronics Center (QPEC), University of Tokyo, Bunkyo, Tokyo 113-8656, Japan

• Tokura Yoshinori

  Department of Applied Physics and Quantum-Phase Electronics Center (QPEC), University of Tokyo, Bunkyo, Tokyo 113-8656, Japan

• Terakura Chieko

  RIKEN Center for Emergent Matter Science (CEMS), Wako, Saitama 351-0198, Japan

• Kotajima Daichi

  Department of Applied Physics and Quantum-Phase Electronics Center (QPEC), University of Tokyo, Bunkyo, Tokyo 113-8656, Japan

• Takeshita Nao

  Electronics and Photonics Research Institute, National Institute of Advanced Industrial Science and Technology, Tsukuba, Ibaraki 305-8568, Japan

• Seki Shinichiro

  Department of Applied Physics and Quantum-Phase Electronics Center (QPEC), University of Tokyo, Bunkyo, Tokyo 113-8656, Japan

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