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Large polaron tunneling and anomalous dielectric response in complex layered systems
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10.1063/1.2216194
/content/aip/journal/jap/100/2/10.1063/1.2216194
http://aip.metastore.ingenta.com/content/aip/journal/jap/100/2/10.1063/1.2216194

Figures

Image of FIG. 1.
FIG. 1.

X-ray diffraction patterns of (a) , (b) nanocomposite P1, and (c) nanocomposite P2.

Image of FIG. 2.
FIG. 2.

Scanning electron micrographs (SEMs) of (a) and (b) nanocomposite P2.

Image of FIG. 3.
FIG. 3.

Impedance spectra, in complex plane representation of (a) nanocomposite P1 and (b) nanocomposite P2. The solid lines are modeled impedance data. Inset of (b) shows the predicted equivalent circuit.

Image of FIG. 4.
FIG. 4.

Temperature variation of conductivity (estimated from the fitted value ).

Image of FIG. 5.
FIG. 5.

Frequency dependence of conductivity at different temperatures of P2.

Image of FIG. 6.
FIG. 6.

ac conductivity at various temperatures of P2.

Image of FIG. 7.
FIG. 7.

Frequency exponent vs temperature of two nanocomposites. The solid curves are fits to Eq. (7).

Image of FIG. 8.
FIG. 8.

Real part of dielectric spectra of nanocomposite P2 at different temperatures.

Image of FIG. 9.
FIG. 9.

Imaginary part of dielectric spectra of nanocomposite P2 at different temperatures.

Image of FIG. 10.
FIG. 10.

log of the real part of dielectric constant vs log of frequency for two nanocomposites at room temperature and lowest temperature.

Image of FIG. 11.
FIG. 11.

Imaginary part of modulus of nanocomposite P2 at different temperatures.

Image of FIG. 12.
FIG. 12.

Temperature variation of relaxation time of all nanocomposites.

Tables

Generic image for table
Table I.

The values of , of , the amount of intercaleted aniline , the temperature at which discontinuity in conductivity occurs (Fig. 4), and the fitted parameter , in Eq. (5).

Generic image for table
Table II.

Polaron size , tunneling distance , and the hopping energy (meV).

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/content/aip/journal/jap/100/2/10.1063/1.2216194
2006-07-20
2014-04-23
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Large polaron tunneling and anomalous dielectric response in complex layered systems
http://aip.metastore.ingenta.com/content/aip/journal/jap/100/2/10.1063/1.2216194
10.1063/1.2216194
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