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Thermal conductivity vs. modulation frequency, f, for natural Si, Ge, and SiGe alloys using different approaches. Open and filled squares represent experimental results from Refs. 15 and 17, respectively. Solid lines: BD model.15 Dashed lines: this work.
Calculated contributions to the thermal effusivity vs. modulation frequency, f, for Si, Ge, and SiGe alloys. Solid: Si. Dashed: Ge. Dotted: SiGe.
Apparent thermal conductivity as a function of temperature for natural Si and Ge and SiGe alloys using different approaches at modulation frequencies of 0.6 MHz (solid) and 10 MHz (dashed). Thin lines: BD model. Thick lines: present approach. Dotted: bulk thermal conductivity values from ab initio calculations. Triangles: experimental results for bulk natural Si19 and Ge.20
Average deviation (%) among theoretical and experimental values for TR measurements.
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