V 2 Te 2 O: A Two-Dimensional van der Waals Correlated Metal

A metastable vanadium oxytelluride V Te O is prepared via a topochemical deintercalation of interlayer Rb cations in Rb V Te O. The new ternary mixed-anion compound crystallizes in a body-centered tetragonal lattice with a = 3.9282(1) Å and c = 13.277(5) Å, containing V O square nets that are sandwi...

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Published in:Inorganic chemistry 2018-12, Vol.57 (23), p.14617-14623
Main Authors: Ablimit, Abduweli, Sun, Yun-Lei, Cheng, Er-Jian, Liu, Ya-Bin, Wu, Si-Qi, Jiang, Hao, Ren, Zhi, Li, Shiyan, Cao, Guang-Han
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container_end_page 14623
container_issue 23
container_start_page 14617
container_title Inorganic chemistry
container_volume 57
creator Ablimit, Abduweli
Sun, Yun-Lei
Cheng, Er-Jian
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description A metastable vanadium oxytelluride V Te O is prepared via a topochemical deintercalation of interlayer Rb cations in Rb V Te O. The new ternary mixed-anion compound crystallizes in a body-centered tetragonal lattice with a = 3.9282(1) Å and c = 13.277(5) Å, containing V O square nets that are sandwiched by Te-atomic sheets. The charge-neutral [V OTe ] block layers stack along the c axis with van der Waals forces, which shows a metallic behavior with a dominant T dependence for resistivity at low temperatures. The electronic specific-heat coefficient reaches 33.9 mJ K mol , ∼4 times that of the electronic structure calculations, suggesting a significant electron-mass renormalization. The electron correlation effect is concurrently demonstrated by the Wilson and Kadowaki-Woods ratios. Neither charge/spin-density wave nor superconductivity was observed down to 0.03 K.
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title V 2 Te 2 O: A Two-Dimensional van der Waals Correlated Metal
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