Abstract

The thermal conductivity and the thermoelectric power of twodimensional hole and electron gases in B and Sb delta-doped Si structures havebeen measured for the first time. The temperature range was 1.4 K to 30 K, andcarrier sheet densities were in the range 0.3 to 1.0×1014 cm-2. Kohn anomalies have been observed in all samples. The thermopoweris dominated by the phonon drag contribution in each case. Calculations of thetemperature dependence of the thermopower agree with experimental data whenunscreened phonon scattering potentials are used for Si:B and Si:Sb.

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