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Transport properties of Co-doped single crystals
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10.1063/1.2396761
/content/aip/journal/jap/100/11/10.1063/1.2396761
http://aip.metastore.ingenta.com/content/aip/journal/jap/100/11/10.1063/1.2396761

Figures

Image of FIG. 1.
FIG. 1.

Temperature dependence of the resistivity in Co-doped samples.

Image of FIG. 2.
FIG. 2.

The dependence of on in Co-doped samples. The solid lines are the linear fits of the experimental data. For convenience the plots for L11 and L12 are shifted along the vertical axis by +0.5 and +1 units, respectively.

Image of FIG. 3.
FIG. 3.

The dependence of on in Co-doped samples. The solid lines are the linear fits of the experimental data. For convenience the plots for L11 and L12 are shifted along the vertical axis by +0.5 and +1 units, respectively.

Image of FIG. 4.
FIG. 4.

vs for seven Co-doped samples with different parameters and . The solid line is the function given by Eq. (5b).

Image of FIG. 5.
FIG. 5.

The plots of vs (O) in Co-doped samples. The dotted line is the linear fit of the data. The solid line is to guide the eyes.

Image of FIG. 6.
FIG. 6.

The plots of vs for Co-doped (closed circles) and Cr-doped (open triangles, the data are taken from Ref. 25) samples of . The lines are to guide the eyes. Inset: The polaron potential well with the depth , the width of the distribution of the disorder energy , and the width of the rigid gap (schematically).

Tables

Generic image for table
Table I.

The doping levels, the values of the characteristic ( and ) and the transition ( and ) temperatures, and the prefactor parameters ( and ) of the Mott and the Shklovskii-Efros VRH conductivity regimes, respectively.

Generic image for table
Table II.

The values of the soft gap , the critical crossover temperatures ( and ) in the models of Rosenbaum (Ref. 28) and Shlimak et al. (Ref. 25), respectively, the width of the impurity band , and the ratio of of the DOS parameters in the Mott (Ref. 22) and the Shklovskii-Efros (Ref. 23) VRH models.

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/content/aip/journal/jap/100/11/10.1063/1.2396761
2006-12-04
2014-04-17
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Transport properties of Co-doped β-FeSi2 single crystals
http://aip.metastore.ingenta.com/content/aip/journal/jap/100/11/10.1063/1.2396761
10.1063/1.2396761
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