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• W4206021432 endingPage "2392" @default.
• W4206021432 startingPage "2383" @default.
• W4206021432 abstract "Dirac semimetal (DSM) Cd3As2 has drawn great attention for exploring the novel quantum phenomena and high-speed optoelectronic applications. The circular photogalvanic effect (CPGE) current, resulting from the optically-excited spin orientation transport, was theoretically predicted to vanish in an ideal Dirac system due to the symmetric photoexcitation about the Dirac point. Here, we reported the observation of the CPGE photocurrent in epitaxial Cd3As2 thin films grown on a GaAs(111)B substrate. The signature of the CPGE is confirmed by its sign reversal upon switching the helicity of optical radiation, as well as its dependence on the excitation incident angle and power. By comparison of the CPGE response between the films with different thicknesses, it is suggested that the observed CPGE results from the reduced structure symmetry and substantially modified electronic band structure of the Cd3As2 thin film that undergoes large epitaxial strain. Our experimental findings provide a valuable reference for the band engineering and exotic helicity-dependent photocurrent phenomena in DSMs towards their potential opto-spintronic device applications." @default.
• W4206021432 created "2022-01-26" @default.
• W4206021432 creator A5031069096 @default.
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• W4206021432 date "2022-01-01" @default.
• W4206021432 modified "2023-10-17" @default.
• W4206021432 title "Strain-induced circular photogalvanic current in Dirac semimetal Cd₃As₂ films epitaxied on a GaAs(111)B substrate" @default.
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• W4206021432 doi "https://doi.org/10.1039/d1nr05812f" @default.
• W4206021432 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/35088779" @default.
• W4206021432 hasPublicationYear "2022" @default.

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