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Terahertz conductivity of the metal-insulator transition in a nanogranular film
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10.1063/1.3518482
/content/aip/journal/apl/97/22/10.1063/1.3518482
http://aip.metastore.ingenta.com/content/aip/journal/apl/97/22/10.1063/1.3518482
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

(a) SEM micrograph of the sample. Examples of terahertz waveforms transmitted through the sapphire substrate (black) and film (red-dashed) at (b) 332.4 K in the insulating state and (c) 390.8 K in the metallic state as the sample is heated.

Image of FIG. 2.
FIG. 2.

Real (squares) and imaginary (circles) components of the THz conductivity of the film at (a) 341.7 K, (b) 337.1 K, (c) 332.6 K, and (d) 328.0 K as the sample is cooled. Fits are for the Drude–Smith model (thick red lines) and Bruggeman EMT (thin blue lines).

Image of FIG. 3.
FIG. 3.

Drude-Smith fit parameters as a function of temperature for the film with . (a) Metallic fraction as the film is heated (red triangles) and cooled (blue squares) compared to the normalized in situ dc-conductivity (black line). (b) -parameter.

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/content/aip/journal/apl/97/22/10.1063/1.3518482
2010-11-30
2014-04-20
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Terahertz conductivity of the metal-insulator transition in a nanogranular VO2 film
http://aip.metastore.ingenta.com/content/aip/journal/apl/97/22/10.1063/1.3518482
10.1063/1.3518482
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