EXCITONS IN 2H-WSE2 AND 3R-WS2
EXCITONS IN 2H-WSE2 AND 3R-WS2
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DOI：
10.1088/0022-3719/9/12/029
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发表时间：
1976-01-01
期刊：
影响因子：
--
通讯作者：
LIANG, WY
中科院分区：
文献类型：
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作者：
BEAL, AR;LIANG, WY
根据Kramers-Kronig法向入射的基面反射谱分析，得到了2 H-WSe 2和3R-WS 2的液氮温度下的λ ~ 2谱中的A激子序列，并将其拟合到洛伦兹振子模型中.结果表明，激子的能级和振子强度符合2 H-WSe 2的三维理论模型和3R-WS 2的二维理论模型.实验结果与Toyozawa（1958）关于弱激子-声子相互作用和小激子有效质量的理论一致。
The A exciton series in the liquid-nitrogen-temperature epsilon 2 spectra of 2H-WSe 2 and 3R-WS 2, derived from Kramers-Kronig analyses of normal-incidence, basal-plane reflectivity spectra, have been fitted to a Lorentzian oscillator model. It has been found that the energy levels and oscillator strengths of the excitons obey a three-dimensional theoretical model for 2H-WSe 2 and a two-dimensional model for 3R-WS 2. The experimental observations are consistent with Toyozawa's (1958) theory for weak exciton-phonon interactions and small exciton effective mass.