Thermal conductivity of InAs/GaSb superlattice

Details Thermal conductivity of InAs/GaSb superlattice Thermal conductivity of InAs/GaSb superlattice

2011-08-25

arxiv.org/abs/1108.5008v1

Physics

Condensed Matter

Materials Science

4 pages, 3 figures

Scientific paper

The cross-plane thermal conductivity of a type II InAs/GaSb superlattice (T2SL) is measured from 13 K to 300 K using the 3{\omega} method. Thermal conductivity is reduced by up to 2 orders of magnitude relative to the GaSb bulk substrate. The low thermal conductivity of around 1-8 W/m\cdotK may serve as an advantage for thermoelectric applications at low temperatures, while presenting a challenge for T2SL quantum cascade lasers and high power light emitting diodes. We introduce a power-law approximation to model non-linearities in the thermal conductivity, resulting in increased or decreased peak temperature for negative or positive exponents, respectively.

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