Synthesis and physical properties of the new oxybismuthides BaTi 2Bi2O and (SrF)2Ti2Bi2O with a d1 square net

Takeshi Yajima, Kousuke Nakano, Fumitaka Takeiri, James Hester, Takafumi Yamamoto, Yoji Kobayashi, Naruki Tsuji, Jungeun Kim, Akihiko Fujiwara, Hiroshi Kageyama

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Abstract

We have recently reported the d1 square-lattice compound BaTi2Sb2O, which shows superconductivity at Tc = 1.2K 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 Tc of 4.6K for BaTi 2Bi2O. However, (SrF)2Ti2Bi 2O exhibits no superconductivity, suggesting the importance of the interlayer interaction for superconductivity. © 2013 The Physical Society of Japan.
Original languageEnglish (US)
JournalJournal of the Physical Society of Japan
Volume82
Issue number1
DOIs
StatePublished - Jan 1 2013
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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