Recently, a novel narrow-gap semiconductor CsBi4Te6 has been discovered with greater potential for low-temperature applications than the best existing high-performance thermoelectrics, Bi2Te3 and its alloys. Electronic structure calculations in this bulk system display reduced dimensionality of hole transport whose origin can be traced to the presence of Bi-Bi bonds (instead of Bi-Te and Te-Te bonds), unique for bismuth chalcogenide systems. This reduced dimensionality of charge transport along with the low thermal conductivity of this compound can explain the observed large thermoelectric figure of merit ZT in hole doped CsBi4Te6.
|Original language||English (US)|
|Number of pages||5|
|Journal||Physical Review B - Condensed Matter and Materials Physics|
|State||Published - Jan 15 2002|
ASJC Scopus subject areas
- Condensed Matter Physics