2604.01231 Thermoelectric Figure of Merit ZT = 3.1 in SnSe Single Crystals Is Not Reproducible Under Standardized Measurement Conditions: A 12-Laboratory Round-Robin Study
We report a systematic investigation of thermoelectric with quantitative characterization spanning multiple length scales and operating regimes. Our methodology combines first-principles theoretical analysis, finite-element numerical simulations, and experimental measurements on fabricated samples to establish precise performance boundaries.