Effects of the electron-phonon interactions on the thermoelectric power in simple mettalic glasses
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説明
Abstract The electron diffusion thermoelectric power has been formulated in a disordered system, where free electrons interact with a random array of thermally vibrating ions. The thermoelectric power was calculated, using the diagram technique, to the lowest order in the pseudopotential, and to the lowest and third orders in the electron-phonon interactions. It is shown that the electron-phonon interactions bring about the following effects: (1) an enhancement of the thermoelectric power at low temperatures and (2) an opposite suppression at relatively high temperatures due to the electron relaxation time. The importance of the latter effect has been pointed out for the first time. The theory was applied to the Mg 64 Al 18 Ga 18 metallic glass, for which the partial structure factors were calculated in a hard-sphere model. The calculated thermoelectric power is found to be consistent with the measured one over the wide temperature range 4–300 K.
収録刊行物
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- Physica B+C
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Physica B+C 144 173-189, 1987-01-01
Elsevier BV