典型文献
Enhanced photogalvanic effect in the two-dimensional MgCl2/ZnBr2 vertical heterojunction by inhomogenous tensile stress
文献摘要：
The photogalvanic effect (PGE) occurring in noncentrosymmetric materials enables the generation of a dc photocurrent at zero bias with a high polarization sensitivity,which makes it very attractive in photodetection.However,the magnitude of the PGE photocurrent is usually small,leading to a low photoresponsivity,and therefore hampers its practical application in photodetection.Here,we propose an approach to largely enhancing the PGE photocurrent by applying an inhomogenous me-chanical stretch,based on quantum transport simulations.We model a two-dimensional photodetector consisting of the wide-bandgap MgCl2/ZnBr2 vertical van der Waals heterojunction with the noncen-trosymmetric C3v symmetry.Polarization-sensitive PGE photocurrent is generated under the vertical illumination of linearly polarized light.By applying inhomogenous mechanical stretch on the lattice,the photocurrent can be largely increased by up to 3 orders of magnitude due to the significantly in-creased device asymmetry.Our results propose an effective way to enhance the PGE by inhomogenous mechanical strain,showing the potential of the MgCl2/ZnBr2 vertical heterojunction in the low-power UV photodetection.
文献关键词：
中图分类号：
作者姓名：
Liyu Qian;Juan Zhao;Yiqun Xie
作者机构：
Department of Physics,Shanghai Normal University,100 Guilin Road,Shanghai 200234,China
文献出处：
引用格式：
[1]Liyu Qian;Juan Zhao;Yiqun Xie-.Enhanced photogalvanic effect in the two-dimensional MgCl2/ZnBr2 vertical heterojunction by inhomogenous tensile stress)[J].物理学前沿,2022(01):168-173
A类：
photogalvanic,inhomogenous,noncentrosymmetric,noncen,trosymmetric
B类：
Enhanced,two,dimensional,MgCl2,ZnBr2,vertical,heterojunction,by,tensile,stress,PGE,occurring,materials,enables,generation,dc,photocurrent,zero,bias,high,polarization,sensitivity,which,makes,very,attractive,photodetection,However,magnitude,usually,small,leading,low,photoresponsivity,therefore,hampers,its,practical,application,Here,propose,approach,largely,enhancing,applying,stretch,quantum,transport,simulations,We,model,photodetector,consisting,wide,bandgap,Waals,C3v,Polarization,sensitive,generated,under,illumination,linearly,polarized,light,By,mechanical,lattice,be,increased,up,orders,due,significantly,device,asymmetry,Our,results,effective,way,enhance,strain,showing,potential,power,UV
AB值：
0.491379
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