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Theory of the Thermopower and Nernst Effect in Random Two‐Component Solid Systems
Author(s) -
Fishchuk I. I.
Publication year - 1995
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2221900225
Subject(s) - nernst equation , seebeck coefficient , nernst effect , percolation theory , component (thermodynamics) , condensed matter physics , thermoelectric effect , conductivity , percolation (cognitive psychology) , electrical resistivity and conductivity , materials science , physics , statistical physics , thermodynamics , quantum mechanics , electrode , neuroscience , biology
The theory of the thermopower and the Nernst effect in inhomogeneous solid systems which consist of random high‐ and low‐conductivity regions is developed using the effective‐medium theory. An approximation is discussed in the case that the effective conductivity depends merely on the pair of conductivities in the components as this would happen in the absence of thermoelectricity. It is shown that this approximation can be used in the presence of thermoelectricity in almost all cases of random two‐component systems. It is found that the Nernst coefficient has the minimum value in the vicinity of the percolation threshold.