Holey topological thermoelectrics

Details Holey topological thermoelectrics Holey topological thermoelectrics

2011-06-30

arxiv.org/abs/1107.0006v1

Appl. Phys. Lett. 99, 113110 (2011)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4+ pages, 6 figures

Scientific paper

10.1063/1.3637055

We study the thermoelectric properties of three-dimensional topological insulators with many holes (or pores) in the bulk. We show that at high density of these holes the thermoelectric figure of merit ZT can be large due to the contribution of the conducting surfaces and the suppressed phonon thermal conductivity. The maximum efficiency can be tuned by an induced gap in the surface states dispersion through tunneling or external magnetic fields. The large values of ZT, much higher than unity for reasonable parameters, make this system a strong candidate for applications in heat management of nanodevices, especially at low temperatures.

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