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• W2328762735 abstract "${mathrm{Ba}}_{0.95}{mathrm{Na}}_{0.05}{mathrm{Ti}}_{2}{mathrm{Sb}}_{2}mathrm{O}$ is a titanium-based oxypnictide superconductor with possible density wave order. We have performed high-resolution angle-resolved photoemission spectroscopy and scanning tunneling microscopy (STM) studies on ${mathrm{Ba}}_{0.95}{mathrm{Na}}_{0.05}{mathrm{Ti}}_{2}{mathrm{Sb}}_{2}mathrm{O}$. Our STM studies find a charge density wave (CDW) order with the wave vector of ($ensuremath{pi}, ensuremath{pi}$). The electronic structure shows both multiorbital and three-dimensional nature, consistent with the theoretical calculations. The observed Fermi surfaces are well nested along the ($ensuremath{pi}, ensuremath{pi}$) direction, which might drive the CDW transition. Likely due to the weak strength of the CDW order, we do not observe a leading-edge gap. Instead, we observe an overall spectral weight enhancement with decreasing temperature, but the rate of this enhancement is abruptly reduced or diminished in the CDW state, suggesting the suppression of spectral weight or opening of a partial CDW gap. Our results give a comprehensive picture of the electronic structure and direct observation of the CDW order in ${mathrm{Ba}}_{0.95}{mathrm{Na}}_{0.05}{mathrm{Ti}}_{2}{mathrm{Sb}}_{2}mathrm{O}$." @default.
• W2328762735 created "2016-06-24" @default.
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• W2328762735 date "2016-01-11" @default.
• W2328762735 modified "2023-10-15" @default.
• W2328762735 title "Electronic structure of the titanium-based oxypnictide superconductor<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML><mml:mrow><mml:msub><mml:mi>Ba</mml:mi><mml:mrow><mml:mn>0.95</mml:mn></mml:mrow></mml:msub><mml:msub><mml:mi>Na</mml:mi><mml:mrow><mml:mn>0.05</mml:mn></mml:mrow></mml:msub><mml:msub><mml:mi>Ti</mml:mi><mml:mn>2</mml:mn></mml:msub><mml:msub><mml:mi>Sb</mml:mi><mml:mn>2</mml:mn></mml:msub><mml:mi mathvariant=normal>O</mml:mi></mml:mrow></mml:math>and direct observation…" @default.
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• W2328762735 doi "https://doi.org/10.1103/physrevb.93.024508" @default.
• W2328762735 hasPublicationYear "2016" @default.
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