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Doping dependence of thermopower and thermoelectricity in strongly correlated materials
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10.1063/1.2712775
/content/aip/journal/apl/90/11/10.1063/1.2712775
http://aip.metastore.ingenta.com/content/aip/journal/apl/90/11/10.1063/1.2712775
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

(Color online) Experimentally measured thermopower (asterisks) at different values of doping for at . The theoretical Heikes curve is provided alongside for comparison. It can be seen that the experimental values are close to the theoretical ones, showing that the Heikes limit is a good approximation at . The values are systematically lower since the Heikes limit is approached from below in temperature.

Image of FIG. 2.
FIG. 2.

(Color online) at for different values of doping for (with ) assuming different values of the the phonon thermal conductivity (assumed to be doping independent). adds to from Eq. (10).

Image of FIG. 3.
FIG. 3.

(Color online) Power factor as a function of doping for as predicted by theory. There are maxima at , , , and . The last two values can be realized in the material, in principle, at doping values and . The positions of the peak are independent of the material parameters in this calculation and a peak at has indeed been seen in experiments on .

Image of FIG. 4.
FIG. 4.

(Color online) at a particular temperature for an arbitrary system. All material dependent parameters are assumed to be the same for the different values of . The slight peak shift is due to the weak logarithmic dependence of on .

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/content/aip/journal/apl/90/11/10.1063/1.2712775
2007-03-14
2014-04-21
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Doping dependence of thermopower and thermoelectricity in strongly correlated materials
http://aip.metastore.ingenta.com/content/aip/journal/apl/90/11/10.1063/1.2712775
10.1063/1.2712775
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