# BPeak and $\beta$ relaxation
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## $\beta$ relaxation is due to BPeak
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- thermally excited BPeak modes scatter/relax low-frequency phonons, but **at higher temperatures equal-population of BPeak modes makes scattering very weak - right?**
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![cc](https://knowen-production.s3.amazonaws.com/uploads/attachment/file/5475/friction.png 'bb')
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## 2016 [An Overview on Short and Long Time Relaxations in Glass-forming Supercooled Liquids](https://iopscience.iop.org/article/10.1088/1742-6596/759/1/012008/pdf)
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 The short time relaxation is known as β-relaxation and the final long time relaxation is called α-relaxation
 
 These results provide a clear connection between short-time dynamics and long-time structural relaxation in glass-forming liquids.
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# Parents
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* Boson peak in glasses⏎