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@@ -23,15 +23,16 @@ The form of the Raman tensors (i.e., which components are non-zero) could be det
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The 18 negligible-polar phonons at the #sym.Gamma point
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correspond to twelve irreducible representations of the C#sub[6v] point group
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(2A#sub[1] + 4B#sub[1] + 2E#sub[1] + 4E#sub[2]).
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By further considering the doubly degenerate modes of the C#sub[6v] (E#sub[1] and E#sub[2])
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By further decomposing the doubly degenerate modes (E#sub[1] and E#sub[2] of C#sub[6v] group)
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in the C#sub[2v] point group,
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the form of the 18 negligible-polar phonons' Raman tensors can be determined, as shown in @table-rep.
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Phonons of the B#sub[1] representation in C#sub[6v] have a zero Raman tensor and do not contribute to Raman scattering,
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the form of the 18 negligible-polar phonons' Raman tensors can be determined, as summarized in @table-rep.
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Phonons of the B#sub[1] representation in C#sub[6v] possess zero Raman tensors
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and thus do not contribute to Raman scattering,
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while other phonons have non-zero Raman tensor components,
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indicating they may be observable in Raman experiments under appropriate incidence and polarization configurations.
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However, whether a mode is sufficiently strong to be experimentally visible
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depends on the magnitudes of its Raman tensor components,
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which cannot be determined solely from symmetry analysis.
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making them potentially observable in Raman experiments under appropriate incidence and polarization configurations.
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It should be noted, however, that the observability in Raman experiment depends not only on the tensor form,
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but also on the magnitude of its Raman tensor components,
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which cannot be inferred from symmetry considerations alone.
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#include "table-rep.typ"
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@@ -49,10 +49,10 @@
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- [x] 中文
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- [x] 英文
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- [x] 调整语言
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- [/] 表示
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- [x] 表示
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- [x] 中文
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- [x] 英文
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- [ ] 调整语言
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- [x] 调整语言
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- [ ] 估算拉曼张量
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- [ ] 中文
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- [ ] 英文
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