Synthesis and Physical Properties of the New Oxybismuthides BaTi2Bi2O and (SrF)2Ti2Bi2O with a d^{1} Square Net

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概要

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• We have recently reported the d^{1} square-lattice compound BaTi2Sb2O, which shows superconductivity at T_{\text{c}} = 1.2 K coexisting with a charge- or spin-density wave (CDW/SDW) state. Here, we successfully prepared two new oxybismuthides, BaTi2Bi2O and (SrF)2Ti2Bi2O, as the first Pn = Bi compounds in the ATi2Pn2O family. The CDW/SDW state disappeared for both compounds, presumably owing to the considerable interaction between the Ti-3d and Bi-6s orbitals. The complete suppression of the CDW/SDW instability resulted in an enhanced T_{\text{c}} of 4.6 K for BaTi2Bi2O. However, (SrF)2Ti2Bi2O exhibits no superconductivity, suggesting the importance of the interlayer interaction for superconductivity.

• 2013-01-15

著者

• Kageyama Hiroshi

  Department Of Applied Chemistry Faculty Of Engineering Osaka University

• NAKANO Kousuke

  Department of Applied Science for Electronics and Materials, Graduate School of Engineering Sciences

• Kobayashi Yoji

  Department Of Earth Sciences Faculty Of Science Kobe University

• Yajima Takeshi

  Department Of Advanced Materials University Of Tokyo

• Hester James

  Bragg Institute Ansto

• TAKEIRI Fumitaka

  Department of Energy and Hydrocarbon Chemistry, Graduate School of Engineering, Kyoto University, Kyoto 615-8510, Japan

• Yamamoto Takafumi

  Department of Energy and Hydrocarbon Chemistry, Graduate School of Engineering, Kyoto University, Kyoto 615-8510, Japan

• Tsuji Naruki

  SPring-8/JASRI, Sayo, Hyogo 679-5198, Japan

• Kim Jungeun

  SPring-8/JASRI, Sayo, Hyogo 679-5198, Japan

• Fujiwara Akihiko

  SPring-8/JASRI, Sayo, Hyogo 679-5198, Japan

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