Local Thermal Conductivity Patterning in Rotating Lattice Crystals of Anisotropic Sb2S3 [* Cross-Reference *]

Version 1.0
Isotta, Eleonora; Wynnychenko, Rosemary; Mukherjee, Binayak; Kaman, Jack; Sahasrabuddhe, Hrushikesh; Zheng, Jiongzhi; Jain, Anubhav; Hautier, Geoffroy; Zevalkink, Alexandra; Musterman, Evan; Dierolf, Volkmar; Jain, Himanshu; Snyder, G. Jeffrey; Balogun, Oluwaseyi, 2026, "Local Thermal Conductivity Patterning in Rotating Lattice Crystals of Anisotropic Sb2S3 [* Cross-Reference *]", https://lore.list.lu/citation?persistentId=perma:LIST.DA1B1V, LIST Open Repository, V1
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Description
The ability to control material heat transport properties over space and time can drive advanced functionalities in thermal management for electronics and system-on-chip, and enable thermal circuits. Despite the technological relevance, there are limited demonstrations of local thermal property control. Rotating lattice single (RLS) crystals—formed via laser-induced crystallization of an amorphous substrate—offer a novel avenue for local crystal engineering, unlocking opportunities for microscale property patterning. Here, thermal conductivity (к) imaging is applied to RLS crystals of Sb2S3 to resolve microscale к variations across patterned regions. Amorphous areas exhibit к as low as 0.6 Wm−1 K−1, while crystalline regions display periodic к variations from 0.7 to over 2.5 Wm−1 K−1. These variations correspond to changes in crystal orientation, revealing marked к anisotropy. The crystal out-of-plane direction (c axis)—featuring van der Waals bonds—shows amorphous-like transport, whereas in-plane directions (a, b axes) exhibit 3.5x and 1.7x larger к, respectively. First-principles calculations, in excellent agreement with experiments, suggest that the in-plane anisotropy originates from expressed Sb lone pairs, which impart a corrugation along the b axis affecting bond stiffness and к. These findings demonstrate microscale control of thermal properties via laser-processed metastructures, with significant implications for next-generation thermal management. (2026-02-23)
***This entry has been automatically imported via Infodoc(ASO) CSV by LIST harvest scripts. Please refer to https://doi.org/10.1002/adfm.202517850 for the original and latest version of the dataset and data downloads*** (2026-06-04)
Subject Physics
Keyword frequency domain thermoreflectance, lone pair expression, thermal circuits, thermal conductivity imaging, thermal conductivity patterning
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