Electronic structure and low-temperature thermoelectric transport of TiCoSb single crystals.

ABSTRACT: Band structure engineering has a strong beneficial impact on thermoelectric performance, where theoretical methods dominate the investigation of electronic structures. Here, we use angle-resolved photoemission spectroscopy (ARPES) to analyze the electronic structure and report on the thermoelectric transport properties of half-Heusler TiCoSb high-quality single crystals. High degeneracy of the valence bands at the L and Γ band maximum points was observed, which provides a band-convergence scenario for the thermoelectric performance of TiCoSb. Previous efforts have shown how crystallographic defects play an important role in TiCoSb transport properties, while the intrinsic properties remain elusive. Using hard X-ray photoelectron spectroscopy (HAXPES), we discard the presence of interstitia

SUBMITTER: Serrano-Sanchez F 

PROVIDER: S-EPMC9302267 | biostudies-literature | 2022 Jul

REPOSITORIES: biostudies-literature