Raman spectra of Cu2BIICIV X4VI magnetic quaternary semiconductor compounds with tetragonal stannite type structure
作者： C. Rincón , M. Quintero , Ch. Power , E. Moreno , E. Quintero
DOI: 10.1063/1.4921438
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摘要: A comparative study of the Raman spectra Cu2BIICIV S4VI and Se4VI(where B = Mn or Fe) magnetic quaternary semiconductor compounds with stannite-type structure (I 4¯2m) has been done. Most fourteen lines expected for these materials were observed in spectra. The two strongest have assigned to IR inactive A11 A12 stannite modes that originated from motion S Se anion around Cu CIV cations remaining at rest. shift frequency about 150 cm−1 lower energies Se4VI as compared those ones, can then be explained due mass effect. Based on fact values frequencies depend mainly bond-stretching forces between nearest-neighbor atoms, vibrational v¯(A12) both several X4VI (where X = S, Se, Te) very close experimental data repor...
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