Dopant-modulated lattice softening drives drastic thermal conductivity reduction in \b{eta}-FeSi2 thermoelectrics

Cuiping Zhang, Qingyong Ren, Yangfan Cui +15

Suppressing lattice thermal conductivity (\k{appa}lat) is pivotal for thermoelectric efficiency. While traditional strategies rely heavily on phonon scattering from mass- and size-…