journal article·2022-06-28Open access

Orientation-Controlled Anisotropy in Single Crystals of Quasi-1D BaTiS3

Boyang Zhao, Md Shafkat Bin Hoque, Gwan Yeong Jung, Hongyan Mei, Shantanu Singh, Guodong Ren, Milena Milich, Qinai Zhao, Nan Wang, Huandong Chen, Shanyuan Niu, Sang-Jun Lee, Cheng-Tai Kuo, Jun-Sik Lee, John A. Tomko, Han Wang, Mikhail A. Kats, Rohan Mishra, Patrick E. Hopkins, Jayakanth Ravichandran

Chemistry of Materials· Volume 34· Issue 12

Abstract

Low-dimensional materials with chain-like (one-dimensional) or layered (two-dimensional) structures are of significant interest due to their anisotropic electrical, optical, and thermal properties. One material with a chain-like structure, BaTiS3 (BTS), was recently shown to possess giant in-plane optical anisotropy and glass-like thermal conductivity. To understand the origin of these effects, it is necessary to fully characterize the optical, thermal, and electronic anisotropy of BTS. To this end, BTS crystals with different orientations (a- and c-axis orientations) were grown by chemical vapor transport. X-ray absorption spectroscopy was used to characterize the local structure and electronic anisotropy of BTS. Fourier transform infrared reflection/transmission spectra show a large in-plane optical anisotropy in the a-oriented crystals, while the c-axis oriented crystals were nearly isotropic in-plane. BTS platelet crystals are promising uniaxial materials for infrared optics with their optic axis parallel to the c-axis. The thermal conductivity measurements revealed a thermal anisotropy of ∼4.5 between the c- and a-axis. Time-domain Brillouin scattering showed that the longitudinal sound speed along the two axes is nearly the same, suggesting that the thermal anisotropy is a result of different phonon scattering rates.
Source: openalex_inverted_index · Quality: baseline

Research context

OpenAlex topics: 2D Materials and Applications · Glass properties and applications · Phase-change materials and chalcogenides

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

Affiliations

Mork Family Department of Chemical Engineering and Materials Science, University of Southern California, Los Angeles, California 90089, United States

Department of Mechanical and Aerospace Engineering, University of Virginia, Charlottesville, Virginia 22904, United States

Department of Mechanical Engineering and Material Science, Washington University in St. Louis, St. Louis, Missouri 63130, United States

Department of Electrical and Computer Engineering, University of Wisconsin−Madison, Madison, Wisconsin 53706, United States

Institute of Materials Science and Engineering, Washington University in St. Louis, St. Louis, Missouri 63130, United States

Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Menlo Park, California 94025, United States

Ming Hsieh Department of Electrical Engineering, University of Southern California, Los Angeles, California 90089, United States

Department of Materials Science and Engineering, University of Virginia, Charlottesville, Virginia 22904, United States

Department of Physics, University of Virginia, Charlottesville, Virginia 22904, United States

Funding

Army Research Office · Basic Energy Sciences · Air Force Office of Scientific Research · University of Southern California · Office of Naval Research · Division of Civil, Mechanical and Manufacturing Innovation · Division of Materials Research

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