Assignment of the Even-Parity Excitons in Cu 2 O
Assignment of the Even-Parity Excitons in Cu 2 O
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Cu 2 O 中偶宇称激子的归属
DOI：
10.1103/physrevlett.43.1260
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发表时间：
1979
影响因子：
8.6
通讯作者：
C. Schwab
中科院分区：
文献类型：
--
作者：
D. Fröhlich;R. Kenklies;C. Uihlein;C. Schwab
这封信第一次提出了详细的双光子光谱的偶宇称激子的黄色系列在${\mathrm{Cu}}_{2}$O。与单光子数据相反，可以直接测量S$和D$激子的贡献，而无需施加外部扰动。的双光子光谱给出的证据之间的强混合的黄色和绿色系列，这是解释交换相互作用和非对角部分的有效质量哈密顿量。
This Letter presents for the first time a detailed two-photon spectrum of the even-parity excitons of the yellow series in ${\mathrm{Cu}}_{2}$O. Contrary to one-photon data, it is possible to measure directly $S$ and $D$ exciton contributions without applying external perturbations. The two-photon spectrum gives evidence for a strong mixing between the yellow and the green series which is explained by exchange interaction and nondiagonal parts in the effective-mass Hamiltonian.