Local phonon mode in thermoelectric Bi2Te2Se from charge neutral antisites
Local phonon mode in thermoelectric Bi2Te2Se from charge neutral antisites
Local modes caused by defects play a significant role in the thermal transport properties of thermoelectrics. Of particular interest are charge-neutral defects that suppress thermal conductivity, without significantly reducing electrical transport. Here, we report a temperature dependent Raman study that identifies such a mode in a standard thermoelectric material, Bi2Te2Se. …