Giant thermoelectric figure of merit in multivalley high-complexity-factor LaSO

Roberta Farris, Francesco Ricci, Giulio Casu +4

We report a giant thermoelectric figure of merit $ZT$ (up to 6 at 1100 K) in $n$-doped lanthanum oxysulphate LaSO. Thermoelectric coefficients are computed from ab initio bands wit…