Measurement of thermal conductance of silicon nanowires at low temperature

Details Measurement of thermal conductance of silicon nanowires at low temperature Measurement of thermal conductance of silicon nanowires at low temperature

2006-08-31

arxiv.org/abs/cond-mat/0608705v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Scientific paper

We have performed thermal conductance measurements on individual single crystalline silicon suspended nanowires. The nanowires (130 nm thick and 200 nm wide) are fabricated by e-beam lithography and suspended between two separated pads on Silicon On Insulator (SOI) substrate. We measure the thermal conductance of the phonon wave guide by the 3 method. The cross-section of the nanowire approaches the dominant phonon wavelength in silicon which is of the order of 100 nm at 1K. Above 1.3K the conductance behaves as T3, but a deviation is measured at the lowest temperature which can be attributed to the reduced geometry.

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