DataVXAdvanced Optical MaterialsPaper
journal article·2022-07

Low‐Frequency Phonon Modes in Layered Silver‐Bismuth Double Perovskites: Symmetry, Polarity, and Relation to Phase Transitions (Advanced Optical Materials 14/2022)

Beatriz Martín‐García, Davide Spirito, Miao‐Ling Lin, Yu‐Chen Leng, Sergey Artyukhin, Ping‐Heng Tan, Roman Krahne

Advanced Optical Materials· Volume 10· Issue 14
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Source abstract

Abstract

Layered metal-halide double perovskite structures are promising lead-free materials for optoelectronics. Their band gap, and therefore also their color, depend on the distortions of the inorganic lattice, and on the number of connected octahedra layers. In article number 2200240, Beatriz Martín-García, Davide Spirito, Roman Krahne and co-workers reveal distinct directionality and spatial symmetries of the low-frequency vibrational modes in Ag–Bi double perovskites, and show that these vibrations are sensitive to phase transitions. This is possible by polarized angle-resolved Raman spectroscopy that enables direct correlation of the linear polarization with the orientation of the octahedra lattice.
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Research context

Electronic materials

OpenAlex topics: Optical and Acousto-Optic Technologies · Ferroelectric and Piezoelectric Materials · Perovskite Materials and Applications

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Affiliations

CIC nanoGUNE BRTA Tolosa Hiribidea, 76 Donostia‐San Sebastian Basque Country 20018 Spain

IHP–Leibniz‐Institut für innovative Mikroelektronik Im Technologiepark 25 15236 Frankfurt (Oder) Germany

State Key Laboratory of Superlattices and Microstructures Institute of Semiconductors Chinese Academy of Sciences Beijing 100083 China

Center of Materials Science and Optoelectronics Engineering & CAS Center of Excellence in Topological Quantum Computation University of Chinese Academy of Sciences Beijing 100190 China

Istituto Italiano di Tecnologia Via Morego 30 Genova 16163 Italy

References

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