TY - JOUR

T1 - Scaling behaviour of the thermopower in a two-component composite near a percolation threshold

AU - Levy, O.

AU - Bergman, D. J.

PY - 1992

Y1 - 1992

N2 - An exact relation between the bulk effective Seebeck coefficient alpha e of a composite conductor and the bulk effective electrical and thermal conductivities sigma e and gamma e is used to study the scaling behaviour of alpha e near percolation. The behaviour turns out to be quite rich, as a result of its dependence on three dimensionless small parameters, namely, the electrical and thermal conductivity ratios of the two components sigma I/ sigma M, gamma I/ gamma M, and the distance away from the percolation threshold Delta p identical to pM-pc. The behaviour of the thermoelectric figure of merit Ze in the different parts of the critical region is also discussed.

AB - An exact relation between the bulk effective Seebeck coefficient alpha e of a composite conductor and the bulk effective electrical and thermal conductivities sigma e and gamma e is used to study the scaling behaviour of alpha e near percolation. The behaviour turns out to be quite rich, as a result of its dependence on three dimensionless small parameters, namely, the electrical and thermal conductivity ratios of the two components sigma I/ sigma M, gamma I/ gamma M, and the distance away from the percolation threshold Delta p identical to pM-pc. The behaviour of the thermoelectric figure of merit Ze in the different parts of the critical region is also discussed.

UR - http://www.scopus.com/inward/record.url?scp=30744451507&partnerID=8YFLogxK

U2 - 10.1088/0305-4470/25/7/027

DO - 10.1088/0305-4470/25/7/027

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AN - SCOPUS:30744451507

SN - 0305-4470

VL - 25

SP - 1875

EP - 1884

JO - Journal of Physics A: Mathematical and General

JF - Journal of Physics A: Mathematical and General

IS - 7

M1 - 027

ER -