Fig. 1: CHESS structure in P- and N-type thin film materials.
From: Nano-engineered thin-film thermoelectric materials enable practical solid-state refrigeration
a, b Schematic of CHESS structures in P- and N-type materials; (c) exemplar TEM cross-section data; (d) hi-resolution XRD data of the (0015) reflection showing the CHESS periodicity matching with the TEM data and the wider 2Ɵ-ω scan (30–70°) inset showing the c-plane orientation in the epitaxial film; (e) Detailed TEM data through the thickness of the CHESS film indicates uniformity.
