Extremely low thermal conductivity in 1-D soft chain structure
Monday, June 22, 2020 - 12:11
in Physics & Chemistry
Researchers have reported a new type of simple one-dimensional (1-D) crystal structured bismuth selenohalides (BiSeX, X = Br, I) with extremely low thermal conductivity. Investigations on crystal structure reveal that the ultralow thermal conductivity is due to the weakened chemical bonding in the low-dimensional structure, showing a quasi-0-D crystal structure. These findings provide a novel selection rule to search low thermal conductivity materials with potential applications in thermoelectrics and thermal barrier coatings.