Dimensional transport crossovers in thermoelectrics revealed by a simple transport model.

ABSTRACT: Quantum confinement gives low-dimensional materials distinctive electronic behaviour, but assessing their effective band structure dimensionality (D) is difficult. Conventional probes such as angle-resolved photoemission spectroscopy (ARPES) or scanning tunneling microscopy (STM) demand ultra clean surfaces and expensive facilities. We introduce a generalized transport model that functions as an internal dimensionality meter: by tracking how the Seebeck coefficient varies with carrier concentration or temperature, we deduce D from two scaling laws, S∝D2lnT in non-degenerate regimes (e.g. S≥200μVK-1 ) and S∝n-2/D in degenerate regimes (e.g. S≤150μVK-1 ). Applying this approach to SrTiO₃, few-layer Bi₂O₂Se and Pb_1-xSn_xTe uncovers tempera

SUBMITTER: Zhang X 

PROVIDER: S-EPMC12698694 | biostudies-literature | 2025 Dec

REPOSITORIES: biostudies-literature