Nanometer-scale interface engineering boosts the thermoelectric performance of n-type Ti 0.4 Hf 0.6 Ni 1+z Sn 0.975 Sb 0.025 alloys

The generation of nanometer-scale interfaces in Ti 0.4 Hf 0.6 Ni 1+z Sb 0.975 Sn 0.025 composites induces significant reduction in their thermal conductivity leading to improved ZT .