Enhanced photosusceptibility in the insulator-to-metal phase transition in vanadium dioxide

Hilton, David; Prasankumar, R. P.; Fourmaux, S.; Cavalleri, Andrea; Brassard, D.; Khakani, My Alì El; Keiffer, J. C.; Taylor, Antoinette; Averitt, Richard D.

doi:10.1007/978-3-540-68781-8_193

Cited by 22 publications

(43 citation statements)

References 5 publications

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“…IV.E. 30 Finally, we mention investigations of the photoinduced metal-insulator transition using far-infrared pulses (Hilton et al, 2007). In these experiments, a threshold fluence was also observed with additional evidence of 30 In this experiment on VO 2 the full conductivity of the metallic state is not obtained and the role of intragap dynamics cannot be strictly ruled out.…”

Section: Pump-probe Spectroscopymentioning

confidence: 84%

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Electrodynamics of correlated electron materials

et al. 2011

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Studies of the electromagnetic response of various classes of correlated electron materials including transition-metal oxides, organic and molecular conductors, intermetallic compounds with d and f electrons, as well as magnetic semiconductors are reviewed. Optical inquiry into correlations in all these diverse systems is enabled by experimental access to the fundamental characteristics of an ensemble of electrons including their self-energy and kinetic energy. Steady-state spectroscopy carried out over a broad range of frequencies from microwaves to UV light and fast optics timeresolved techniques provides complimentary prospectives on correlations. Because the theoretical understanding of strong correlations is still evolving, the review is focused on the analysis of the universal trends that are emerging out of a large body of experimental data augmented where possible with insights from numerical studies.

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Section: Pump-probe Spectroscopymentioning

confidence: 84%

“…Baum et al (2007);Cavalleri et al (2004Cavalleri et al ( , 2005Cavalleri et al ( , 2001;Hilton et al (2007);Kübler et al (2007);Nakajima et al (2008);Rini et al (2008).…”

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confidence: 99%

Electrodynamics of correlated electron materials

et al. 2011

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“…, since THz probe is much more sensitive to metallization of VO 2 [28,36]. The existence of an excitation threshold provides decisive evidence that the IMT in VO 2 is induced by high-field THz transients.…”

Section: (C)]mentioning

confidence: 97%

Tunneling breakdown of a strongly correlated insulating state inVO2induced by intense multiterahertz excitation

et al. 2015

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We directly trace the near-and mid-infrared transmission change of a VO 2 thin film during an ultrafast insulator-to-metal transition triggered by high-field multi-terahertz transients. Non-thermal switching into a metastable metallic state is governed solely by the amplitude of the applied terahertz field. In contrast to resonant excitation below the threshold fluence, no signatures of excitonic self-trapping are observed. Our findings are consistent with the generation of spatially separated charge pairs and a cooperative transition into a delocalized metallic state by THz field-induced tunneling. The tunneling process is a condensed-matter analogue of the Schwinger effect in nonlinear quantum electrodynamics. We find good agreement with the pair production formula by replacing the Compton wavelength with an electronic correlation length of 2.1 Å.

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“…There has been considerable controversy over the relative importance of a Peierls scenario with strong electron-phonon coupling and electronic correlations representing Mott physics; nevertheless consensus has been reached that electron-electron interactions are an important aspect. Another interesting issue is the relation between the structural phase transition in VO 2 and the first-order metal-insulator transition observed in various electronic properties [7][8][9][10][11][12][13][14][15][16][17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Optical properties of VO2 films at the phase transition: Influence of substrate and electronic correlations

Peterseim

Dressel

Dietrich

et al. 2016

Journal of Applied Physics

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Thin films of VO2 on different substrates, Al2O3 and SiO2/Si, have been prepared and characterized from room temperature up to 360 K. From the band structure in the rutile metallic phase and in the monoclinic insulating phase the optical properties are calculated and compared with reflection measurements as a function of temperatures. Various interband transitions can be assigned and compared with previous speculations. We extract the parameters of the metallic charge carriers that evolve upon crossing the insulator-to-metal phase transition and find effects by the substrate. The effect of electronic correlations becomes obvious at the phase transition.

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Enhanced photosusceptibility in the insulator-to-metal phase transition in vanadium dioxide

Cited by 22 publications

References 5 publications

Electrodynamics of correlated electron materials

Electrodynamics of correlated electron materials

Tunneling breakdown of a strongly correlated insulating state inVO2induced by intense multiterahertz excitation

Optical properties of VO2 films at the phase transition: Influence of substrate and electronic correlations

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