Mid-wave and Long-Wave Infrared Linear Dichroism in a Hexagonal Perovskite Chalcogenide

Niu, Shanyuan; Zhao, Huan; Zhou, Yucheng; Huyan, Huaixun; Zhao, Boyang; Wu, Jiang-Bin; Cronin, Stephen B.; Wang, Han; Ravichandran, Jayakanth

doi:10.1021/acs.chemmater.8b02279

Cited by 22 publications

(23 citation statements)

References 31 publications

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“…Crystal structure of BaTiS 3 . We synthesized needle-like single crystals of BaTiS 3 with dimensions up to~2 cm × 100 μm × 50 μm using chemical vapor transport 35,36 . BaTiS 3 has a BaNiO3type hexagonal perovskite structure in which the octahedra of Ti coordinated by S atoms share common faces, resulting in chain-like structures along the c axis.…”

Section: Resultsmentioning

confidence: 99%

“…Growth of BaTiS 3 single crystals. Single-crystal needles were grown using chemical vapor transport, similar to methods employed for other perovskite sulfides reported elsewhere 35,36 . The precursors, barium sulfide (Sigma-Aldrich, 99.9%), titanium (Alfa Aesar, 99.9%), and sulfur (Alfa Aesar, 99.999%) were mixed stoichiometrically and loaded in a quartz ampoule with the transporting agent iodine (Alfa Aesar 99.99%) in an argon-filled glove box.…”

Section: Methodsmentioning

confidence: 99%

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

et al. 2020

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Crystalline solids exhibiting glass-like thermal conductivity have attracted substantial attention both for fundamental interest and applications such as thermoelectrics. In most crystals, the competition of phonon scattering by anharmonic interactions and crystalline imperfections leads to a non-monotonic trend of thermal conductivity with temperature. Defect-free crystals that exhibit the glassy trend of low thermal conductivity with a monotonic increase with temperature are desirable because they are intrinsically thermally insulating while retaining useful properties of perfect crystals. However, this behavior is rare, and its microscopic origin remains unclear. Here, we report the observation of ultralow and glass-like thermal conductivity in a hexagonal perovskite chalcogenide single crystal, BaTiS3, despite its highly symmetric and simple primitive cell. Elastic and inelastic scattering measurements reveal the quantum mechanical origin of this unusual trend. A two-level atomic tunneling system exists in a shallow double-well potential of the Ti atom and is of sufficiently high frequency to scatter heat-carrying phonons up to room temperature. While atomic tunneling has been invoked to explain the low-temperature thermal conductivity of solids for decades, our study establishes the presence of sub-THz frequency tunneling systems even in high-quality, electrically insulating single crystals, leading to anomalous transport properties well above cryogenic temperatures.

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

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

et al. 2020

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“…BaTiS3 belongs to an emerging family of inorganic perovskite materials with a general chemical formula, ABX3, where A is typically an alkaline earth or alkali metal ion, and B is a transition metal ion surrounded by six anions (X). [30][31][32][33] . The A ions are encapsulated within the hexagonal BX6 structure.…”

Section: Resultsmentioning

confidence: 99%

Linear Dichroism Conversion in Quasi‐1D Perovskite Chalcogenide

Cong

Niu

et al. 2019

Advanced Materials

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Anisotropic photonic materials with linear dichroism property are crucial components in many sensing, imaging and emerging light based quantum communication applications. Such materials play an important role as polarizers, filters, wave-plates, phase-matching elements in photonic devices and circuits. Conventional crystalline materials with optical anisotropy typically show strong unidirectional linear dichroism over a broad wavelength range and even bandgap variations along different crystal directions. On the other hand, the linear dichroism conversion phenomenon -the orthogonal switch in the principle dichroism axis of the material across different optical wavelengthhas not been observed in crystalline materials. Here, we report the investigation of the unique linear dichroism conversion phenomenon in quasi-one-dimensional (quasi-1D) hexagonal perovskite chalcogenide BaTiS3. The material shows record level of optical anisotropy within the visible wavelength range. In contrast to conventional anisotropic optical materials, the linear dichroism polarity in BaTiS3 makes an orthogonal change at an optical wavelength corresponding to the photon energy of 1.78 eV. First principle calculations reveal that this anomalous linear dichroism conversion behavior originates from different selection rules of the optical transitions from the parallel bands in the BaTiS3 material. Wavelength dependent polarized Raman spectroscopy further confirms this phenomenon. Such material with linear dichroism conversion property can facilitate new ability to control and sense the energy, phase, and polarization of light, and lead to novel photonic devices such as polarization-wavelength selective detectors and lasers for multispectral imaging, sensing and optical communication applications.

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“…In our previous studies, we have demonstrated high quality synthesis of polycrystalline TMPCs through solid state reaction in sealed ampoules, 9 as well as single crystal growth with chemical vapor transport and salt flux methods. [19][20][21] We have also evaluated their physical properties for photovoltaics and anisotropic Infrared photonic materials. 9,[19][20][21] In this work, we will study the thermal stability of several transition metal perovskite related sulfides in air, including a-SrZrS 3 (α-SZS), b-SrZrS 3 (b -SZS), BaZrS 3 (BZS), Ba 2 ZrS 4 (BZS214), and Ba 3 Zr 2 S 7 (BZS327).…”

Section: Introductionmentioning

confidence: 99%

Thermal stability study of transition metal perovskite sulfides

et al. 2018

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Transition metal perovskite chalcogenides, a class of materials with rich tunability in functionalities, are gaining increased attention as candidate materials for renewable energy applications. Perovskite oxides are considered excellent n-type thermoelectric materials.Compared to oxide counterparts, we expect the chalcogenides to possess more favorable thermoelectric properties such as lower lattice thermal conductivity and smaller band gap, making them promising material candidates for high temperature thermoelectrics. Thus, it is necessary to study the thermal properties of these materials in detail, especially thermal stability, to evaluate their potential. In this work, we report the synthesis and thermal stability study of five compounds, a-SrZrS 3 , b-SrZrS 3 , BaZrS 3 , Ba 2 ZrS 4 , and Ba 3 Zr 2 S 7 . These materials cover several structural types including distorted perovskite, needle-like, and Ruddlesden-Popper phases.Differential scanning calorimeter and thermo-gravimetric analysis measurements were performed up to 1200°C in air. Structural and chemical characterizations such as X-ray diffraction, Raman spectroscopy, and energy dispersive analytical X-ray spectroscopy were performed on all the samples before and after the heat treatment to understand the oxidation process. Our studies show that perovskite chalcogenides possess excellent thermal stability in air at least up to 600°C.

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Mid-wave and Long-Wave Infrared Linear Dichroism in a Hexagonal Perovskite Chalcogenide

Cited by 22 publications

References 31 publications

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

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

Linear Dichroism Conversion in Quasi‐1D Perovskite Chalcogenide

Thermal stability study of transition metal perovskite sulfides

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