Kousuke Nakano

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

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 \(A\)Ti2 Pn 2O 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.

Two Superconducting Phases in the Isovalent Solid Solutions BaTi2Pn2O (Pn = As, Sb, and Bi)

We have recently reported two superconductors with the \(d^{1}\) square lattice, BaTi2Sb2O (\(T_{\text{c}}=1.2\) K) and BaTi2Bi2O (\(T_{\text{c}}=4.6\) K). In order to find a clue behind the superc...

S-Wave Superconductivity in Superconducting BaTi[2]Sb[2]O Revealed by [121/123]Sb-NMR/Nuclear Quadrupole Resonance Measurements

We report the

Tc Enhancement by Aliovalent Anionic Substitution in Superconducting BaTi2(Sb1-xSnx)2O

^{121/123}

Valence Band Engineering of Layered Bismuth Oxyhalides toward Stable Visible-Light Water Splitting: Madelung Site Potential Analysis

Sb-NMR/nuclear quadrupole resonance (NQR) measurements on the newly-discovered superconductor BaTi

Phonon dispersions and Fermi surfaces nesting explaining the variety of charge ordering in titanium-oxypnictides superconductors

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Hypervalent Bismuthides La3MBi5 (M = Ti, Zr, Hf) and Related Antimonides: Absence of Superconductivity

Sb

Investigation into Structural Phase Transitions in Layered Titanium-Oxypnictides by a Computational Phonon Analysis

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Hierarchically Porous Monoliths Based on N-Doped Reduced Titanium Oxides and Their Electric and Electrochemical Properties

O with a two-dimensional Ti

Redox behavior of ceria-zirconia solid solutions modified by the chemical filing process

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