Thermal Conductance of Ballistic Point Contacts

Details Thermal Conductance of Ballistic Point Contacts Thermal Conductance of Ballistic Point Contacts

2011-11-04

arxiv.org/abs/1111.1164v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Scientific paper

We study the thermal conductance of ballistic point contacts. These contacts are realized as few nanometer long pillars in so called air-gap heterostructures (AGHs). The pillar length being much smaller that the mean free path of the phonons up to room temperature. Due to the small dimension and the low density of the pillars the thermal conductance of the AGHs is several orders of magnitude reduced in comparison to bulk structures. The measurement results are in quantitative agreement with a simple model that based on the Boltzmann transport equation.

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