Synthesis, characterization, and electronic structure of KV3Te3O0.42

Wu, Eric J.; Pell, Michael A.; Genin, Hugh; Ibers, James A.

doi:10.1016/s0925-8388(98)00585-4

Cited by 7 publications

(9 citation statements)

References 50 publications

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“…These two changes together release the internal stress and stabilize the compound. Note that this result is quantitatively in agreement with the previous study by Wu et al…”

Section: Resultssupporting

confidence: 93%

“…First, our 300 K resistivities are low, 5.1, 3.8, and 3.8 × 10 –4 Ω cm for KV 3 Te 3 O 0.33 , RbV 3 Te 3 O 0.32 , and CsV 3 Te 3 O 0.35 , respectively, and are of the same order as KV 3 Se 3 and all other TlFe 3 Te 3 -type compounds (∼10 –4 Ω cm). Note that our values are several orders of magnitude smaller than those measured by Wu et al using a two-probe method on KV 3 Te 3 O 0.42 at 298 K (∼41.6 Ω cm) . Here, all three tellurides exhibit a metal–semiconductor-metal transition identified by the change is sign of dρ( T )/d T .…”

Section: Resultscontrasting

confidence: 71%

“…We speculate that the oxygen comes from the oxidized surface of our raw materials (the vanadium powders and/or alkali metals), which is supported by the powder X-ray diffraction of our polycrystalline sample presented below. Note this centered oxygen atom was also observed by Wu et al, in KV 3 Te 3 O 0.42 , where the O content, 0.42, is larger than our results . We note that the presence of interstitial oxygen in AV 3 Te 3 O δ is an unintentional effect and was not part of our synthetic aim.…”

Section: Resultssupporting

confidence: 68%

“…Although the Q1D telluride KV 3 Te 3 O 0.42 adopts the same P 6 3 / m symmetry as the Mo- and Cr-based compounds, it contains V 3 cluster triangles stacked side-by-side into columnar chains with oxygen unexpectedly occupying the center of the octahedra as discerned from single crystal X-ray diffraction . Here we report single-crystal synthesis employing an A 2 Q x flux of a series of Q1D V-based TlFe 3 Te 3 -type crystals: KV 3 Se 3 , KV 3 Te 3 O 0.33 , RbV 3 Te 3 O 0.32 , and CsV 3 Te 3 O 0.35 .…”

Section: Introductionmentioning

confidence: 92%

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Local Distortions and Metal–Semiconductor–Metal Transition in Quasi-One-Dimensional Nanowire Compounds AV₃Q₃O_δ (A = K, Rb, Cs and Q = Se, Te)

et al. 2021

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Metal cluster compounds have garnered renewed interest in the search for novel superconductors and topological semimetals owing to structural instabilities of metal-cluster geometries and broken symmetries. Here we synthesized needle-like crystals of the V-cluster-based quasi-one-dimensional (Q1D) materials AV3Q3Oδ (A = K, Rb, Cs, Q = Se, Te) which can also be viewed as being composed of parallel nanowires. We examine how changes in their average and local structure control their electronic properties. All compounds crystallize in the TlFe3Te3-type structure (P63/m space group) with infinite (V3Q3)− double-walled columnar chains separated by A+ cations. Our single-crystal and synchrotron powder diffraction studies indicate oxygen atoms partially occupy the center site of the V6 octahedral metal cluster cages in KV3Te3O0.33, RbV3Te3O0.32, and CsV3Te3O0.35, whereas KV3Se3 is structurally oxygen-free. Our synchrotron X-ray pair distribution function (PDF) analyses indicate that the oxygen-free V6 cluster octahedra in KV3Se3 are highly distorted perpendicular to the chain direction even at room temperature, reducing the symmetry of the average structure from hexagonal P63/m to monoclinic P21/m. Our theoretical calculation supports this P21/m distortion and suggests the structure further distorts to P21 or P21/c at lower temperatures. In contrast, the oxygen-centered V-cluster in KV3Te3O0.33 exhibits a V3-triangle-trimerization along the chain direction. This feature is discernible from the local PDF and is consistent with lattice dynamical calculations based on density functional theory. Resistivity measurements indicate that KV3Se3 exhibits metallic behavior, whereas a dramatic metal–semiconductor–metal transition emerges in KV3Te3O0.33, RbV3Te3O0.32, and CsV3Te3O0.35 because of oxygen disorder and changes in local structure captured from our electronic structure analyses of the Fermi surface. Our investigation of the AV3Q3Oδ family demonstrates the importance of understanding local changes in structure driven by electronic instabilities, which can guide the search for new quantum materials in other low-dimensional cluster-compound materials.

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“…These two changes together release the internal stress and stabilize the compound. Note that this result is quantitatively in agreement with the previous study by Wu et al…”

Section: Resultssupporting

confidence: 93%

Section: Resultscontrasting

confidence: 71%

Section: Resultssupporting

confidence: 68%

Section: Introductionmentioning

confidence: 92%

See 2 more Smart Citations

Local Distortions and Metal–Semiconductor–Metal Transition in Quasi-One-Dimensional Nanowire Compounds AV₃Q₃O_δ (A = K, Rb, Cs and Q = Se, Te)

et al. 2021

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“…[OV 6 ] octahedra which are stabilized by m 4 -Te 2-and m 3 -Se 2-are found in KV 3 Te 3 O 0.42 (14) and V 6 Se 8 O(PMe 3 ) 6 (15), respectively.…”

Section: Introductionmentioning

confidence: 99%

Synthesis, Crystal Structure, Magnetism, and Optical Properties of Gd3[SiON3]O—An Oxonitridosilicate Oxide with Noncondensed SiON3 Tetrahedra

Höppe

Kotzyba

Pöttgen

et al. 2002

Journal of Solid State Chemistry

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ChemInform Abstract: Synthesis, Characterization, and Electronic Structure of KV₃Te₃O_0.42.

Pell

Genin

et al. 1998

ChemInform

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Synthesis, characterization, and electronic structure of KV3Te3O0.42

Cited by 7 publications

References 50 publications

Local Distortions and Metal–Semiconductor–Metal Transition in Quasi-One-Dimensional Nanowire Compounds AV₃Q₃O_δ (A = K, Rb, Cs and Q = Se, Te)

Local Distortions and Metal–Semiconductor–Metal Transition in Quasi-One-Dimensional Nanowire Compounds AV₃Q₃O_δ (A = K, Rb, Cs and Q = Se, Te)

Synthesis, Crystal Structure, Magnetism, and Optical Properties of Gd3[SiON3]O—An Oxonitridosilicate Oxide with Noncondensed SiON3 Tetrahedra

ChemInform Abstract: Synthesis, Characterization, and Electronic Structure of KV₃Te₃O_0.42.

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Synthesis, characterization, and electronic structure of KV3Te3O0.42

Cited by 7 publications

References 50 publications

Local Distortions and Metal–Semiconductor–Metal Transition in Quasi-One-Dimensional Nanowire Compounds AV3Q3Oδ (A = K, Rb, Cs and Q = Se, Te)

Local Distortions and Metal–Semiconductor–Metal Transition in Quasi-One-Dimensional Nanowire Compounds AV3Q3Oδ (A = K, Rb, Cs and Q = Se, Te)

Synthesis, Crystal Structure, Magnetism, and Optical Properties of Gd3[SiON3]O—An Oxonitridosilicate Oxide with Noncondensed SiON3 Tetrahedra

ChemInform Abstract: Synthesis, Characterization, and Electronic Structure of KV3Te3O0.42.

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Local Distortions and Metal–Semiconductor–Metal Transition in Quasi-One-Dimensional Nanowire Compounds AV₃Q₃O_δ (A = K, Rb, Cs and Q = Se, Te)

Local Distortions and Metal–Semiconductor–Metal Transition in Quasi-One-Dimensional Nanowire Compounds AV₃Q₃O_δ (A = K, Rb, Cs and Q = Se, Te)

ChemInform Abstract: Synthesis, Characterization, and Electronic Structure of KV₃Te₃O_0.42.