journal article·2020-08

Light‐Controlled Ferromagnetism in Porphyrin Functionalized Ultrathin FeS Nanosheets

Gang Zhou, Tinghui Li, Yuying Wu, Peifang Wang, Kangmin Leng, Chongchong Liu, Yun Shan, Lizhe Liu

Advanced Optical Materials· Volume 8· Issue 15
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Abstract

Abstract The intrinsically weak photomagnetic interaction makes it difficult to realize effectively light‐controlled magnetic structure transformation. Here unprecedented light‐induced switching of magnetism is reported in porphyrin functionalized ultrathin FeS nanosheets. Contrary to the antiferromagnetic (AFM) bulk, the troilite FeS nanosheets demonstrate a ferromagnetic (FM) behavior due to superficial symmetry breaking. Under light irradiation, a large number of photo‐generated carriers take part in a singlet‐to‐triplet conversion through intersystem crossing of tetra(4‐carboxyphenyle)porphyrin molecules decorated on the nanosheets. The generated triplet carriers make spin flips occur at FeS surface, finally leading to a magnetic structure transition from FM to AFM configuration. The findings not only shed new light on steering arrangement of spin electrons but also open up almost unlimited possibilities for spintronics and optical detection of spin‐dependent physiological reactions.
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Research context

OpenAlex topics: Porphyrin and Phthalocyanine Chemistry · Molecular Junctions and Nanostructures · Quantum Dots Synthesis And Properties

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

Affiliations

Key Laboratory of Integrated Regulation and Resource Development on Shallow Lake of Ministry of Education College of Environment Hohai University Nanjing 210098 P. R. China

College of Electronic Engineering Guangxi Normal University Guilin 541004 P. R. China

MOE Key Laboratory of Modern Acoustics Institute of Acoustics and Collaborative Innovation Center of Advanced Microstructures National Laboratory of Solid State Microstructures Nanjing University Nanjing 210093 P. R. China

Key Laboratory of Advanced Functional Materials of Nanjing Nanjing Xiaozhuang University Nanjing 211171 P. R. China

Funding

National Basic Research Program of China · National Natural Science Foundation of China · Major Science and Technology Program for Water Pollution Control and Treatment · Natural Science Foundation of Jiangsu Province · Fundamental Research Funds for the Central Universities

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