Thermal conductivity of InAs/GaSb type II superlattice

Chuanle Zhou*, B. M. Nguyen, Manijeh Razeghi, Matthew A Grayson

*Corresponding author for this work

Research output: Contribution to journalArticle

7 Scopus citations

Abstract

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

Original languageEnglish (US)
Pages (from-to)2322-2325
Number of pages4
JournalJournal of Electronic Materials
Volume41
Issue number9
DOIs
StatePublished - Sep 1 2012

Keywords

  • Thermal conductivity
  • interband cascade lasers
  • photodiode
  • thermoelectric
  • type II superlattice

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering
  • Materials Chemistry

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