Raman scattering study of zinc blende and wurtzite ZnS

被引:248
作者
Cheng, Y. C. [1 ,2 ]
Jin, C. Q. [1 ,2 ]
Gao, F. [1 ,2 ]
Wu, X. L. [1 ,2 ,3 ]
Zhong, W. [1 ,2 ]
Li, S. H. [4 ]
Chu, Paul K. [3 ]
机构
[1] Nanjing Univ, Dept Phys, Nanjing 210093, Peoples R China
[2] Nanjing Univ, Natl Lab Solid State Microstruct, Nanjing 210093, Peoples R China
[3] City Univ Hong Kong, Dept Phys & Mat Sci, Kowloon, Hong Kong, Peoples R China
[4] Nanjing Univ, Lab Mesoscop Chem, Inst Theoret & Computat Chem, Dept Chem, Nanjing 210093, Peoples R China
关键词
ab initio calculations; Brillouin zones; electronic density of states; II-VI semiconductors; phonons; Raman spectra; wide band gap semiconductors; zinc compounds; SELECTION RULES; PHONONS; CRYSTALS; DIAMOND; STATES;
D O I
10.1063/1.3270401
中图分类号
O59 [应用物理学];
学科分类号
摘要
We have conducted an experimental and theoretical study on first- and second-order Raman scattering of zinc blende and wurtzite ZnS. Based on the calculated phonon band structure, phonon density of states, and symmetry selection rules, we have clearly identified for the first time the origins of these vibration modes in the second-order Raman spectra from these two polymorphs. For zinc blende ZnS, it is found that the previously estimated frequency of the LA mode at X point in the Brillouin-zone boundary is much smaller than the value obtained from other experiments and our calculation. Considering the involvement of LA phonon at X point, we reassign the second-order Raman active modes and some other modes which have not yet been understood so far. This work clarifies some of the controversial Raman mode assignments in zinc blende and wurtzite ZnS.
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页数:5
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