Fig. 1: Structural and thermal transport properties of BaTiS3 single crystal. | Nature Communications

Fig. 1: Structural and thermal transport properties of BaTiS3 single crystal.

From: High frequency atomic tunneling yields ultralow and glass-like thermal conductivity in chalcogenide single crystals

Fig. 1: Structural and thermal transport properties of BaTiS3 single crystal.The alternative text for this image may have been generated using AI.

Illustration of the BaTiS3 structure in perspective view along c axis (a) and projected down a axis (b). Blue and orange spheres denote Ba and S atoms, respectively. Octahedra formed by Ti and six surrounding S atoms are highlighted in green. c XRD measurement of a crystal to identify the crystallographic directions. The left inset panel of c is an SEM image of the sample for which thermal conductivity was measured using TDTR. The right inset panel of c is the rocking curve for the 200 reflections. STEM HAADF images showing c axis (d) and a axis (e) projection of BaTiS3. The bottom panels show the high-resolution HAADF images with overlaid atomic models. f Measured thermal conductivity versus temperature for BaTiS3 (green) and other materials from literature. First-principles calculations using temperature-dependent effective potential (TDEP) method are also shown (black dashed line). Data for BaTiO3 and SrTiO3, amorphous silica (a-SiO2), Bi2Te3, CsBiNb2O7, CsPbI3, NaNbO3, Tl3VSe4, AgSbSe2, SnSe and (SnS)1.2(TiS2)2 are from refs. 4,16,18,19,21,26,41,69,70, respectively. The estimation of error bars is detailed in Supplementary Information.

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