Journal
SCIENCE ADVANCES
Volume 6, Issue 9, Pages -Publisher
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/sciadv.aay4213
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Funding
- Department of Materials Science and Engineering at Rensselaer Polytechnic Institute
- NSF [1635520, 1916652, 1712752]
- Air Force Office of Scientific Research [FA9550-18-1-0116]
- Office of Naval Research [N000141812408]
- New York State's Empire State Development's Division of Science, Technology and Innovation through Focus Center Contract [C150117]
- DOE Office of Science [DE-AC02-06CH11357]
- NSF-MIP Platform for the Accelerated Realization, Analysis, and Discovery of Interface Materials (PARADIM) [DMR-1539918]
- U.S. Department of Defense (DOD) [N000141812408] Funding Source: U.S. Department of Defense (DOD)
- Directorate For Engineering
- Div Of Civil, Mechanical, & Manufact Inn [1635520] Funding Source: National Science Foundation
- Div Of Electrical, Commun & Cyber Sys
- Directorate For Engineering [1916652] Funding Source: National Science Foundation
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Spin and valley degrees of freedom in materials without inversion symmetry promise previously unknown device functionalities, such as spin-valleytronics. Control of material symmetry with electric fields (ferroelectricity), while breaking additional symmetries, including mirror symmetry, could yield phenomena where chirality, spin, valley, and crystal potential are strongly coupled. Here we report the synthesis of a halide perovskite semiconductor that is simultaneously photoferroelectricity switchable and chiral. Spectroscopic and structural analysis, and first-principles calculations, determine the material to be a previously unknown low-dimensional hybrid perovskite (R)-(-)-1-cyclohexylethylammonium/(S)-(+)-1 cyclohexylethylammonium) PbI3. Optical and electrical measurements characterize its semiconducting, ferroelectric, switchable pyroelectricity and switchable photoferroelectric properties. Temperature dependent structural, dielectric and transport measurements reveal a ferroelectric-paraelectric phase transition. Circular dichroism spectroscopy confirms its chirality. The development of a material with such a combination of these properties will facilitate the exploration of phenomena such as electric field and chiral enantiomer-dependent Rashba-Dresselhaus splitting and circular photogalvanic effects.
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