Synthesis, Structure, and Properties of the Layered Oxyselenide Ba2CuO2Cu2Se2Click to copy article linkArticle link copied!
- Wenmin LiWenmin LiBeijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, ChinaSchool of Physics, University of Chinese Academy of Sciences, Beijing 100190, ChinaMore by Wenmin Li
- Zhaoming FuZhaoming FuBeijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, ChinaMore by Zhaoming Fu
- Xiancheng Wang*Xiancheng Wang*E-mail: [email protected] (X.W.).Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, ChinaMore by Xiancheng Wang
- Jun ZhangJun ZhangBeijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, ChinaSchool of Physics, University of Chinese Academy of Sciences, Beijing 100190, ChinaMore by Jun Zhang
- Min LiuMin LiuBeijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, ChinaSchool of Physics, University of Chinese Academy of Sciences, Beijing 100190, ChinaMore by Min Liu
- Jianfa ZhaoJianfa ZhaoBeijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, ChinaSchool of Physics, University of Chinese Academy of Sciences, Beijing 100190, ChinaMore by Jianfa Zhao
- Meiling JinMeiling JinBeijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, ChinaSchool of Physics, University of Chinese Academy of Sciences, Beijing 100190, ChinaMore by Meiling Jin
- Guoqiang ZhaoGuoqiang ZhaoBeijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, ChinaSchool of Physics, University of Chinese Academy of Sciences, Beijing 100190, ChinaMore by Guoqiang Zhao
- Guangyang DaiGuangyang DaiBeijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, ChinaSchool of Physics, University of Chinese Academy of Sciences, Beijing 100190, ChinaMore by Guangyang Dai
- Zheng DengZheng DengBeijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, ChinaMore by Zheng Deng
- Sijia ZhangSijia ZhangBeijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, ChinaMore by Sijia Zhang
- Shaomin FengShaomin FengBeijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, ChinaMore by Shaomin Feng
- Zhiwei HuZhiwei HuMax Plank Institute for Chemical Physics of Solids, Nöthnitzer Strasse 40, D-01187 Dresden, GermanyMore by Zhiwei Hu
- Qingzhen HuangQingzhen HuangCenter for Neutron Research, National Institute of Standards and Technology, Gaithersburg, Maryland 20899-6102, United StatesMore by Qingzhen Huang
- Hongji LinHongji LinNational Synchrotron Radiation Research Center (NSRRC), 101 Hsin-Ann Road, Hsinchu 30076, TaiwanMore by Hongji Lin
- Chien-Te ChenChien-Te ChenNational Synchrotron Radiation Research Center (NSRRC), 101 Hsin-Ann Road, Hsinchu 30076, TaiwanMore by Chien-Te Chen
- Yifeng Yang*Yifeng Yang*E-mail: [email protected] (Y.Y.).Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, ChinaSchool of Physics, University of Chinese Academy of Sciences, Beijing 100190, ChinaCollaborative Innovation Center of Quantum Matter, Beijing 100190, ChinaMore by Yifeng Yang
- Changqing Jin*Changqing Jin*E-mail: [email protected] (C.J.).Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, ChinaSchool of Physics, University of Chinese Academy of Sciences, Beijing 100190, ChinaCollaborative Innovation Center of Quantum Matter, Beijing 100190, ChinaMore by Changqing Jin
Abstract
A new layered oxyselenide, Ba2CuO2Cu2Se2, was synthesized under high-pressure and high-temperature conditions and was characterized via structural, magnetic, and transport measurements. It crystallizes into space group I4/mmm and consists of a square lattice of [CuO2] planes and antifluorite-type [Cu2Se2] layers, which are alternately stacked along the c axis. The lattice parameters are obtained as a = b = 4.0885 Å and c = 19.6887 Å. The Cu–O bond length is given by half of the lattice constant a, i.e., 2.0443 Å. Ba2CuO2Cu2Se2 is a semiconductor with a resistivity of ∼18 mΩ·cm at room temperature. No magnetic transition was found in the measured temperature range, and the Curie–Weiss temperature was obtained as −0.2 K, suggesting a very weak exchange interaction. The DFT+Ueff calculation demonstrates that the band gap is about 0.2 eV for the supposed antiferromagnetic order, and the density of state near the top of the valence band is mainly contributed from the Se 4p electrons.
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