Phase Transition and V4+-V4+ Pairing in VO2(B)

Oka, Yoshio; Yao, Takeshi; Yamamoto, Naoichi; Ueda, Yutaka; Hayashi, Akihiko

doi:10.1006/jssc.1993.1215

Cited by 86 publications

(87 citation statements)

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“…13 On the contrary, the transport measurement of VO 2 (B) films supports the previous low-temperature X-ray studies on VO 2 (B) which revealed an evolution from a high temperature monoclinic metallic phase to another monoclinic insulating phase at low temperature. 14 Fig . 5 shows the valence band photo emission spectra of A, B, and M phases of VO 2 measured by hard X-ray photoelectron spectroscopy (HAXPES).…”

Section: (F) In The110 Domain (Rotated By 90mentioning

confidence: 99%

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Selective growth of single phase VO2(A, B, and M) polymorph thin films

et al. 2015

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We demonstrate the growth of high quality single phase films of VO2(A, B, and M) on SrTiO3 substrate by controlling the vanadium arrival rate (laser frequency) and oxidation of the V atoms. A phase diagram has been developed (oxygen pressure versus laser frequency) for various phases of VO2 and their electronic properties are investigated. VO2(A) phase is insulating VO2(B) phase is semi-metallic, and VO2(M) phase exhibits a metal-insulator transition, corroborated by photo-electron spectroscopic studies. The ability to control the growth of various polymorphs opens up the possibility for novel (hetero)structures promising new device functionalities.

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Section: (F) In The110 Domain (Rotated By 90mentioning

confidence: 99%

“…From these HAADF-STEM image analyses, we can conclude that the VO 2 (A) and VO 2 (B) thin films present a structure expected from bulk studies. 14,16 The thin film microstructure studies underline the presence of 90…”

Section: (F) In The110 Domain (Rotated By 90mentioning

confidence: 99%

Selective growth of single phase VO2(A, B, and M) polymorph thin films

et al. 2015

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“…The tetragonal rutile structure, VO 2 (R), exits above 337 K with six atoms (2 V þ 4 O) in the crystal unit cell described by lattice constants a ¼ 4.530 A, c = 2.869 A [6,[10][11][12][13][14]. This structure is distorted slightly by shear, doubling its crystal unit cell (twelve atoms, 4 V þ 8 O), and becoming monoclinic below 337 K with lattice constants a ¼ 5.743 A, b ¼ 4.517 A, and c ¼ 5.375 A [5][6][7][8][9]. Both crystal structures are based on an oxygen bcc lattice with vanadium at the octahedral sites and oxygen octahedra being approximately regular.…”

Section: Geometric Structurementioning

confidence: 99%

“…Of these, vanadium dioxide (VO 2 ), where vanadium appears with its second largest valency (V 4+ ), represents a prominent member due to its extremely interesting physical and chemical properties. The crystalline bulk dioxide undergoes a first order phase transition at 337 K which separates a low-temperature monoclinic (distorted rutile) crystal phase [5][6][7][8][9] from a tetragonal rutile phase [6,[10][11][12][13][14] at high temperatures. This structural phase transition is combined with an electronic semiconductor-to-metal transition where the electrical conductivity changes by several orders of magnitude which is exploited in critical thermistors and threshold switches [15].…”

Section: Introductionmentioning

confidence: 99%

Electronic Structure of Vanadium Dioxide: Ab initio Density Functional Theory Studies of Periodic and Local Systems

Hermann

Chakrabarti

Haras

et al. 2001

phys. stat. sol. (a)

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The electronic structure of vanadium dioxide in its monoclinic and tetragonal (rutile) phase are calculated using the ab initio FP-LAPW method. Both VO 2 phases yield very similar band structures and densities of states (DOS) as expected from their structural similarity. A comparison of theoretical band dispersions of tetragonal VO 2 with recent angular resolved photoemission data yields very good agreement, which confirms the reliability of the FP-LAPW method to account for electronic dispersions in the present systems. The calculations yield metallic behavior for both VO 2 phases in contrast to experimental findings of the monoclinic phase being a small gap semiconductor. This discrepancy is explained by missing correlation contributions in the density functional theory (DFT) scheme used in the calculations. The DOS curves of the bulk systems are compared with the DOS of VO 2 (011) surface clusters obtained by DFT calculations and yield very close similarity in the O 2p band region without surface specific features which remains to be explained.

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“…1(h)]. [15] The sodiation/desodiation in vanadium oxide cathode are complex multi-electronic reaction processes. The applications of vanadium oxides in SIBs are restricted by rapid capacity fading caused by a decrease of the Na diffusion coefficient and severe structure deterioration.…”

Section: Introductionmentioning

confidence: 99%

Nanostructured layered vanadium oxide as cathode for high-performance sodium-ion batteries: a perspective

2017

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Sodium-ion batteries (SIBs) have received intensive attentions owing to the abundant and inexpensive sodium (Na) resource. Layered vanadium oxides are featured with various valence states and corresponding compounds, and through multi-electron reaction they are capable to deliver high Na storage capacity. The rational construction of unique structures is verified to improve their Na storage properties. This perspective provides an overview of recent advances in layered vanadium oxide for SIBs, with a particular focus on construction of novel nanostructures, and mechanism studies via in situ characterization. Finally, we predict possible breakthroughs and future trends that lie ahead for high-performance layered vanadium oxides SIBs cathode.

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Phase Transition and V4+-V4+ Pairing in VO2(B)

Cited by 86 publications

References 0 publications

Selective growth of single phase VO2(A, B, and M) polymorph thin films

Selective growth of single phase VO2(A, B, and M) polymorph thin films

Electronic Structure of Vanadium Dioxide: Ab initio Density Functional Theory Studies of Periodic and Local Systems

Nanostructured layered vanadium oxide as cathode for high-performance sodium-ion batteries: a perspective

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