DOI: 10.1038/srep09182. New Insights into the Diverse Electronic Phases of a Novel Vanadium Dioxide Polymorph: A Terahertz Spectroscopy Study

New Insights into the Diverse Electronic Phases of a Novel Vanadium Dioxide Polymorph: A Terahertz Spectroscopy Study

10.1038/srep09182

Crossref journal-article

Springer Science and Business Media LLC

Scientific Reports (297)

Abstract

AbstractA remarkable feature of vanadium dioxide is that it can be synthesized in a number of polymorphs. The conductivity mechanism in the metastable layered polymorph VO2(B) thin films has been investigated by terahertz time-domain spectroscopy (THz-TDS). In VO2(B), a critical temperature of 240 K marks the appearance of a non-zero Drude term in the observed complex conductivity, indicating the evolution from a pure insulating state towards a metallic state. In contrast, the THz conductivity of the well-known VO2(M1) is well fitted only by a modification of the Drude model to include backscattering. We also identified two different THz conductivity regimes separated by temperature in these two polymorphs. The electronic phase diagram is constructed, revealing that the width and onset of the metal-insulator transition in the B phase develop differently from the M1 phase.

Bibliography

Lourembam, J., Srivastava, A., La-o-vorakiat, C., Rotella, H., Venkatesan, T., & Chia, E. E. M. (2015). New Insights into the Diverse Electronic Phases of a Novel Vanadium Dioxide Polymorph: A Terahertz Spectroscopy Study. Scientific Reports, 5(1).

Authors 6

James Lourembam (first)
Amar Srivastava (additional)
Chan La-o-vorakiat (additional)
H. Rotella (additional)
T. Venkatesan (additional)
Elbert E. M. Chia (additional)

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Dates

Type	When
Created	10 years, 5 months ago (March 17, 2015, 6:37 a.m.)
Deposited	2 years, 7 months ago (Jan. 5, 2023, 7:46 p.m.)
Indexed	1 week, 6 days ago (Aug. 23, 2025, 1:11 a.m.)
Issued	10 years, 5 months ago (March 17, 2015)
Published	10 years, 5 months ago (March 17, 2015)
Published Online	10 years, 5 months ago (March 17, 2015)

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BibTeX

@article{Lourembam_2015, title={New Insights into the Diverse Electronic Phases of a Novel Vanadium Dioxide Polymorph: A Terahertz Spectroscopy Study}, volume={5}, ISSN={2045-2322}, url={http://dx.doi.org/10.1038/srep09182}, DOI={10.1038/srep09182}, number={1}, journal={Scientific Reports}, publisher={Springer Science and Business Media LLC}, author={Lourembam, James and Srivastava, Amar and La-o-vorakiat, Chan and Rotella, H. and Venkatesan, T. and Chia, Elbert E. M.}, year={2015}, month=mar }

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