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Wolfram, T.; Sutcu, L. F.

doi:10.1103/physrevb.31.7680

Cited by 17 publications

(5 citation statements)

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“…The calculations for real crystallographic modifications of WO, [110] give more realistic estimates of this parameter, 1.7 eV (orthorhombic structure) and 2.4 eV (monoclinic structure), the general features of the valence spectrum being preserved. The electronic structure of Na,WO, bronzes has also been calculated [110,114] and good agreement of the obtained results with the rigid band model suggestions is reported. A t present a number of calculations for oxides using cluster models are also available.…”

Section: Interatomic Interactions In Some Carbides and Nitrides Of Susupporting

confidence: 67%

Electronic Properties of Carbides, Nitrides, and Oxides of Subgroup VIa Transition Metals. Theory and Experiment

Ivanovskiĭ¹,

Novikov²,

Gubanov³

1987

Physica Status Solidi (b)

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Section: Interatomic Interactions In Some Carbides and Nitrides Of Susupporting

confidence: 67%

Electronic Properties of Carbides, Nitrides, and Oxides of Subgroup VIa Transition Metals. Theory and Experiment

Ivanovskiĭ¹,

Novikov²,

Gubanov³

1987

Physica Status Solidi (b)

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“…The localization and delocalization of states associated with MIT occurs in a very narrow range of energy close to E F in Na x WO 3 ; hence, photoemission spectroscopy is one of the appropriate tools to elucidate the mechanism of MIT. Most of the published angle-integrated photoemission literatures [10][11][12][13] were not able to resolve the mechanism of MIT. Höchst et al 14 have performed angle-resolved photoemission spectroscopy ͑ARPES͒ on metallic Na 0.85 WO 3 single crystal with relatively low energy and momentum resolution, and to our knowledge no further systematic ARPES results are available for a full range of x.…”

Section: Introductionmentioning

confidence: 99%

Electronic structure of sodium tungsten bronzesNaxWO3by high-resolution angle-resolved photoemission spectroscopy

et al. 2007

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The electronic structure of sodium tungsten bronzes, Na x WO 3 , for full range of x is investigated by highresolution angle-resolved photoemission spectroscopy ͑HR-ARPES͒. The experimentally determined valenceband structure has been compared with the results of ab initio band-structure calculation. The HR-ARPES spectra taken in both the insulating and metallic phase of Na x WO 3 reveal the origin of metal-insulator transition ͑MIT͒ in the sodium tungsten bronze system. In the insulating Na x WO 3 , the near-E F states are localized due to the strong disorder caused by the random distribution of Na + ions in WO 3 lattice. While the presence of an impurity band ͑level͒ induced by Na doping is often invoked to explain the insulating state found at low concentrations, there is no signature of impurity band ͑level͒ found from our results. Due to disorder and Anderson localization effect, there is a long-range Coulomb interaction of conduction electrons; as a result, the system is insulating. In the metallic regime, the states near E F are populated and the Fermi level shifts upward rigidly with increasing electron doping ͑x͒. The volume of electronlike Fermi surface ͑FS͒ at the ⌫͑X͒ point gradually increases with increasing Na concentration due to W 5dt 2g band filling. A rigid shift of E F is found to give a qualitatively good description of the FS evolution.

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“…Among the oxide conductor materials, WO 2 and Na x WO 3 ( x > 2.5) are two key tungstic metallic oxides. , Their energy band structures are shown in Figure (the conduction band and valence band of WO 2 are denoted as CB 1 and VB 1 , respectively; the conduction band and the intrinsic valence band of Na x WO 3 are denoted as CB 2 and VB 2–0 , respectively; the new energy level produced by Na doping of Na x WO 3 is denoted as VB 2–1 ). According to the energy band structure of WO 2 , its valence-band top and conduction-band minimum are located at −0.1 eV and −0.7 eV, respectively.…”

mentioning

confidence: 99%

IR-Driven Photocatalytic Water Splitting with WO₂–Na_xWO₃ Hybrid Conductor Material

et al. 2015

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An IR-driven photocatalytic water splitting system based on WO2-NaxWO3 (x > 0.25) hybrid conductor materials was established for the first time; this system can be directly applied in seawater. The WO2-NaxWO3 (x > 0.25) hybrid conductor material was readily prepared by a high-temperature reduction process of semiconductor NaxWO3 (x < 0.25) nanowire bundles. A novel ladder-type carrier transfer process is suggested for the established IR-driven photocatalytic water splitting system.

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xdependence of the electronic properties of cubicNaxWO3

Cited by 17 publications

References 40 publications

Electronic Properties of Carbides, Nitrides, and Oxides of Subgroup VIa Transition Metals. Theory and Experiment

Electronic Properties of Carbides, Nitrides, and Oxides of Subgroup VIa Transition Metals. Theory and Experiment

Electronic structure of sodium tungsten bronzesNaxWO3by high-resolution angle-resolved photoemission spectroscopy

IR-Driven Photocatalytic Water Splitting with WO₂–Na_xWO₃ Hybrid Conductor Material

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xdependence of the electronic properties of cubicNaxWO3

Cited by 17 publications

References 40 publications

Electronic Properties of Carbides, Nitrides, and Oxides of Subgroup VIa Transition Metals. Theory and Experiment

Electronic Properties of Carbides, Nitrides, and Oxides of Subgroup VIa Transition Metals. Theory and Experiment

Electronic structure of sodium tungsten bronzesNaxWO3by high-resolution angle-resolved photoemission spectroscopy

IR-Driven Photocatalytic Water Splitting with WO2–NaxWO3 Hybrid Conductor Material

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About

IR-Driven Photocatalytic Water Splitting with WO₂–Na_xWO₃ Hybrid Conductor Material