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Pressure-induced K-Λ Crossover of Excitons Emissions in Monolayer WSe2 and MoSe2
Fu, Xin-Peng; Zhou, Qiang; Qin, Li; Li, Fang-Fei; Fu, Xi-Hong
2018
发表期刊CHINESE JOURNAL OF LUMINESCENCE
ISSN10007032
卷号39期号:12页码:1647-1653
摘要Monolayer MoSe2 and WSe2 samples were prepared by mechanical exfoliation in diamond anvil cell(DAC). The high-pressure micro-area fluorescence spectroscopy technique was used to study excitons emission behavior under pressure in argon pressure-transmitting medium(PTM). The neutral and negative exciton evolutionary trends of monolayer WSe2 showed an inflection point at 2.43 GPa, and the neutral exciton emission of monolayer MoSe2 appeared a new split peak at 3.7 GPa. Combined with the first-principles calculation and analysis, we confirmed that the mechanism of these discontinuities is the pressure-induced conduction band bottom K- crossover. This result can be extended to the entire two-dimensional layered material family, and laying foundation for the development of exciton devices. 2018, Science Press. All right reserved.
关键词Tungsten compounds Calculations Excitons Fluorescence spectroscopy Molybdenum compounds Monolayers Selenium compounds
DOI10.3788/fgxb20183912.1647
收录类别EI
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文献类型期刊论文
条目标识符http://ir.ciomp.ac.cn/handle/181722/60776
专题中国科学院长春光学精密机械与物理研究所
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Fu, Xin-Peng,Zhou, Qiang,Qin, Li,et al. Pressure-induced K-Λ Crossover of Excitons Emissions in Monolayer WSe2 and MoSe2[J]. CHINESE JOURNAL OF LUMINESCENCE,2018,39(12):1647-1653.
APA Fu, Xin-Peng,Zhou, Qiang,Qin, Li,Li, Fang-Fei,&Fu, Xi-Hong.(2018).Pressure-induced K-Λ Crossover of Excitons Emissions in Monolayer WSe2 and MoSe2.CHINESE JOURNAL OF LUMINESCENCE,39(12),1647-1653.
MLA Fu, Xin-Peng,et al."Pressure-induced K-Λ Crossover of Excitons Emissions in Monolayer WSe2 and MoSe2".CHINESE JOURNAL OF LUMINESCENCE 39.12(2018):1647-1653.
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