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Hopping conductivity in Mn-doped single crystals
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10.1063/1.2976336
/content/aip/journal/jap/104/5/10.1063/1.2976336
http://aip.metastore.ingenta.com/content/aip/journal/jap/104/5/10.1063/1.2976336

Figures

Image of FIG. 1.
FIG. 1.

Temperature dependence of the resistivity in Mn-doped samples [top panel (a)], the plots of vs [middle panel (b)], and vs [bottom panel (c)]. The lines in the top panel are to guide the eyes while those in the middle and bottom panels are the linear fits of the data.

Image of FIG. 2.
FIG. 2.

vs for five Mn-doped samples with different parameters and . The solid line is the function given by Eq. (11).

Image of FIG. 3.
FIG. 3.

The plots of vs and in Mn-doped samples. The solid line is to guide the eyes. The dashed and dotted lines are the linear fit of the data.

Image of FIG. 4.
FIG. 4.

The plots of vs for Mn-doped (crosses, this work), Cr-doped (open triangles, the data are taken from Ref. 16), and Co-doped (closed circles, the data are taken from Ref. 17) samples of . The lines are to guide the eyes.

Tables

Generic image for table
Table I.

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

Generic image for table
Table II.

The widths of the impurity band and of the soft Coulomb gap , the critical crossover temperatures in the models of Rosenbaum and Shlimak et al. , the scaling constant and temperature , the ratio of of the DOS parameters in the Mott- and the SE-VRH conduction models, and the rigid gap .

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/content/aip/journal/jap/104/5/10.1063/1.2976336
2008-09-11
2014-04-25
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Hopping conductivity in Mn-doped β-FeSi2 single crystals
http://aip.metastore.ingenta.com/content/aip/journal/jap/104/5/10.1063/1.2976336
10.1063/1.2976336
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