DataVXAdvanced Functional MaterialsPaper
journal article·2026-02Open access

Local Thermal Conductivity Patterning in Rotating Lattice Crystals of Anisotropic Sb 2 S 3

Eleonora Isotta, Rosemary Wynnychenko, Binayak Mukherjee, Jack Kaman, Hrushikesh Sahasrabuddhe, Jiongzhi Zheng, Anubhav Jain, Geoffroy Hautier, Alexandra Zevalkink, Evan Musterman, Volkmar Dierolf, Himanshu Jain, G. Jeffrey Snyder, Oluwaseyi Balogun

Advanced Functional Materials· Volume 36· Issue 16
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Abstract

Abstract 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 (𝜅) imaging is applied to RLS crystals of Sb 2 S 3 to resolve microscale 𝜅 variations across patterned regions. Amorphous areas exhibit 𝜅 as low as 0.6 Wm −1 K −1 , while crystalline regions display periodic 𝜅 variations from 0.7 to over 2.5 Wm −1 K −1 . These variations correspond to changes in crystal orientation, revealing marked 𝜅 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 𝜅, 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 𝜅. These findings demonstrate microscale control of thermal properties via laser‐processed metastructures, with significant implications for next‐generation thermal management.
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Research context

OpenAlex topics: Phase-change materials and chalcogenides · Chalcogenide Semiconductor Thin Films · Advanced Thermoelectric Materials and Devices

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Department of Materials Science and Engineering Northwestern University Evanston 60208 USA

Department of Mechanical Engineering Northwestern University Evanston 60208 USA

Department of Physics Wellesley College Wellesley 02481 USA

Luxembourg Institute of Science and Technology Esch‐sur‐Alzette 4362 Luxembourg

Department of Materials Science and Engineering, and Institute for Functional Materials and Devices Lehigh University Bethlehem 18015 USA

Department of Materials Science and Engineering University of California Berkeley CA 94720 USA

Energy Technologies Area Lawrence Berkeley National Laboratory Berkeley CA 94720 USA

Thayer School of Engineering Dartmouth College Hanover NH 03755 USA

Department of Materials Science and NanoEngineering Rice University Houston TX 77005 USA

Rice Advanced Materials Institute Rice University Houston TX 77005 USA

Department of Chemical Engineering and Materials Science Michigan State University East Lansing 48824 USA

National Synchrotron Light Source II Brookhaven National Laboratory Upton NY 11973 USA

Department of Physics and Institute for Functional Materials and Devices Lehigh University Bethlehem 18015 USA

Department of Civil and Environmental Engineering Northwestern University Evanston 60208 USA

Funding

National Science Foundation · HORIZON EUROPE Framework Programme · U.S. Department of Energy

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