20 lines
1.0 KiB
XML
20 lines
1.0 KiB
XML
== Phonons in Perfect 4H-SiC
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我们将声子被分为两类讨论：
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极性可以忽略的声子模式（即极性为零或非常弱的声子），在拉曼散射过程中它们的电极性造成的效应可以忽略；
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强极性声子模式，在拉曼光谱中电极性效应是可观测的，不可以被忽略。
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These phonons were categorized into two groups and discussed separately, according to their electrical polarities:
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phonons with negligible polarities (i.e., zero or very weak electrical polarity),
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where atoms of the same species vibrated in opposite directions,
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resulting in effective cancellation of electrical polarization during the Raman process
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(gray lines in @figure-discont);
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and phonons with strong polarities
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where atoms of the same species vibrated in phase,
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resulting in strong electrical polarization and observable effects in Raman spectra
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(colored lines in @figure-discont).
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#include "figure-discont.typ"
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#include "non-polar/default.typ"
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#include "polar/default.typ"
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