Cover Picture: The Influence of Nanoscale Heterostructures on the Thermoelectric Properties of Bi‐substituted Tl 5 Te 3 (Z. Anorg. Allg. Chem. 6/2017)

The background of the cover image displays a backscattered electron SEM image (with inverted colors, width ca. 3 µm) of a nanostructured sample with the nominal composition (Tl 4.5 Bi 0.5 Te 3 ) 0.6 (TlInTe 2 ) 0.4 . The light blue areas indicate correspond to TlInTe 2 whereas the dark blue ones originate from Tl 4.5 Bi 0.5 Te 3 . In the crystal structure of Tl 4.5 Bi 0.5 Te 3 in the foreground, arrows indicate the distortion compared to Tl 5 Te 3 . The structure was elucidated by resonant powder X‐ray diffraction. In the graph at the bottom, the overall thermal conductivities of pure Tl 4.5 Bi 0.5 Te 3 and the nanostructured sample (Tl 4.5 Bi 0.5 Te 3 ) 0.6 (TlInTe 2 ) 0.4 are compared, indicating the better performance of the composite at elevated temperatures. More details can be found in the article by Heinke and Oeckler et al. on page 447 ff .