Journal
PHYSICAL REVIEW LETTERS
Volume 86, Issue 19, Pages 4350-4353Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.86.4350
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Tl9BiTe6 exhibits a thermoelectric figure of merit of ZT similar to 1.2 around 500 K, which significantly exceeds the state-of-the-art materials in this temperature range. The extraordinary thermoelectric performance is mainly due to the extremely low thermal conductivity of Tl9SiTe6 [0.39 W/(m . K) at 300 K]. In fact, the minimum lifetime of the phonons has to be taken into account to describe the thermal conductivity data.
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