Figure 4: The Nernst coefficient of Co0.999Ni0.001Sb3. | Nature Communications

Figure 4: The Nernst coefficient of Co0.999Ni0.001Sb3.

From: Large Seebeck effect by charge-mobility engineering

Figure 4

The green solid line represents ATdμH/dT, the expected contribution to ν(T) from the marked charge mobility change (cf. equation (1)), where the prefactor A=−(π2/3) kB/|e|. The quantitative agreement found below 40 K between this calculation and the measured Nernst coefficient (black symbols) lends strong evidence that the enhanced Nernst signal originates from the significant mobility mismatch across the sample. The red dashed line displays the Hall mobility μH(T). ν(T) is expected to approximately scale with μH(T) assuming a weak temperature dependence of the latter, which indeed holds above 40 K (see text for details).

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