The effect of the long-range order in a quantum dot array on the in-plane lattice thermal conductivity

A. Khitun, A. Balandin, J. L. Liu, K. L. Wang

Research output: Contribution to journalArticlepeer-review

21 Citations (Scopus)

Abstract

Semiconductor quantum dot superlattices consisting of arrays of quantum dots have shown great promise for a variety of device applications, including thermoelectric power generation and cooling. In this paper we theoretically investigate the effect of long-range order in a quantum dot array on its in-plane lattice thermal conductivity. It is demonstrated that the long-range order in a quantum dot array enhances acoustic phonon scattering and, thus leads to a decrease of its lattice thermal conductivity. The decrease in the ordered quantum dot array, which acts as a phonon grating, is stronger than that in the disordered one due to the contribution of the coherent scattering term. The numerical calculations were carried out for a structure that consists of multiple layers of Si with layers of ordered Ge quantum dots separated by wetting layers and spacers.

Original languageEnglish
Pages (from-to)1-8
Number of pages8
JournalSuperlattices and Microstructures
Volume30
Issue number1
DOIs
Publication statusPublished - 2001 Jul

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

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