Phonon drag of electrons in Ag2S |
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Authors: | S. A. Aliev F. F. Aliev Z. S. Gasanov S. M. Abdullayev R. I. Selim-zade |
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Affiliation: | 1.Institute of Physics,Academy of Sciences of Azerbaijan,Baku,Azerbaijan |
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Abstract: | The temperature dependences of the heat-conductivity coefficient χ and the thermopower 6h of Ag2S are investigated in the range of 4.2–300 K. It is found that the value of 6h sharply increases (6h ∞ T-3) with decreasing T at T < 100 K and passes through a maximum at 16–18 K. The heat-conductivity coefficient passes through a maximum at ≈30 K. The sharp increase in 6h is found to be caused by the effect of long-wavelength-phonon drag of electrons. It is shown that the shift of the 6h and χ peaks, as well as the temperature dependence of the phonon thermopower 6hph ∞ T-3, agrees with the Herring theory. |
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