Thermoelectric figure of merit enhancement in Si and SiGe quantum wires due to spatial confinement of acoustic phonons

A. Khitun, A. Balandin, K. L. Wang, G. Chen

Research output: Contribution to journalConference articlepeer-review

1 Citation (Scopus)

Abstract

Thermoelectric figure of merit of Si and SiGe quantum wires was theoretically investigated rigorously taking into account spatial confinement of both electrons and phonons. The calculations were carried out for cylindrical quantum wires with radius 1.5 nm <a<15 nm and infinite potential barriers. A significant enhancement of the thermoelectric figure of merit is predicted despite the decrease of the carrier mobility in very narrow quantum wires. The enhancement is mostly due to the drop in the lattice thermal conductivity caused by the spatial confinement of acoustic phonons and the corresponding increase in phonon relaxation rates.

Original languageEnglish
Pages (from-to)181-184
Number of pages4
JournalInternational Conference on Thermoelectrics, ICT, Proceedings
Publication statusPublished - 1999
Event18th International Conference on Thermoelectrics (ICT'99) - Baltimore, MD, USA
Duration: 1999 Aug 291999 Sep 2

All Science Journal Classification (ASJC) codes

  • Engineering(all)

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