Abstract
The thermoelectric dc transport properties of five single-crystal tungsten samples have been measured over the temperature range 1.2-7 K. In addition to the electrical resistivity, thermal resistivity, and thermoelectric power, a new thermoelectric function G (T) was determined; the properties of this function and the method for measuring it are analyzed. Evidence for electron-phonon scattering was observed for both the electrical and thermal resistivity, appearing as a deviation from a quadratic temperature dependence usually associated with the electron-electron interaction. The thermoelectric coefficients S (T) and G (T) were positive below about 5 K for all samples with a sign reversal occurring at higher temperatures. Below 3 K, a marked impurity dependence in the thermoelectric properties was observed. No sample exhibited the characteristic temperature dependence of electron-electron scattering. The sign reversal at higher temperatures is attributed to the onset of a phonon-drag mechanism.
Original language | English (US) |
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Pages (from-to) | 4825-4841 |
Number of pages | 17 |
Journal | Physical Review B |
Volume | 10 |
Issue number | 12 |
DOIs | |
State | Published - 1974 |
Externally published | Yes |
ASJC Scopus subject areas
- Condensed Matter Physics