Strain engineering of anisotropic light-matter interactions in onedimensional P-P chain of SiP_(2)
作者机构：National Laboratory of Solid State Microstructures and Jiangsu Key Laboratory of Artificial Functional MaterialsCollege of Engineering and Applied SciencesNanjing UniversityNanjing 210000China College of Materials Science and EngineeringNational Engineering Research Center for Magnesium AlloysChongqing UniversityChongqing 400030China Center for High Pressure Science and Technology Advanced ResearchBeijing 100094China
出 版 物：《Nano Research》 (纳米研究（英文版）)
年 卷 期：2022年第15卷第8期
页 面：7378-7383页
核心收录：
学科分类：08[工学] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 0702[理学-物理学]
基 金：the National Natural Science Foundation of China(Nos.51861145201,52072168,21733001,and 91750101) the National Key Basic Research Program of the Ministry of Science and Technology of China(Nos.2018YFA0306200 and 2021YFA1202901) Jiangsu Key Laboratory of Artificial Functional Materials.L.Y.F.acknowledges financial support from the start-up fund of Chongqing University(No.02110011044171)
主 题：strain engineering silicon diphosphide Raman photoluminescence
摘 要：Strain engineering can serve as a powerful technique for modulating the exotic properties arising from the atomic structure of *** have been demonstrated that one-dimensional(1D)structure can serve as a great platform for modulating electronic band structure and phonon dispersion via strain ***,in a van der Waals material silicon diphosphide(SiP_(2)),quasi-1D zigzag phosphorus–phosphorus(P–P)chains are embedded inside the crystal structure,and can show unique phonon vibration modes and realize quasi-1D *** those optical properties by the atom displacements via strain engineering is of great interest in understanding underlying mechanism of such P–P chains,however,which remains ***,we demonstrate the strain engineering of Raman and photoluminescence(PL)spectra in quasi-1D P–P chains and resulting in anisotropic manipulation in SiP_(2).We find that the phonon frequencies of SiP_(2)in Raman spectra linearly evolve with a uniaxial strain along/perpendicular to the quasi-1D P–P chain ***,by applying tensile strain along the P–P chains,the band gap energy of strained SiP_(2)can significantly decrease with a tunable value of~55 *** on arsenic(As)element doping into SiP_(2),the strain-induced redshifts of phonon frequencies decrease,indicating the stiffening of the phonon vibration with the increased arsenic doping *** results provide an opportunity for strain engineering of the light–matter interactions in the quasi-1D P–P chains of SiP_(2)crystal for potential optical applications.
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