Spontaneous decay of TA phonons.

Spontaneous decay of TA phonons.
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TA 声子的自发衰变。

DOI:
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发表时间:
1985
期刊:
Physical Review B (Condensed Matter)
影响因子:
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通讯作者:
H. Maris
H. Maris
中科院分区:
--
文献类型:
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作者:
Shin;H. Maris

文献摘要

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考虑真实的晶体的弹性各向异性,研究了满足A“w» kBT的高能横声学(TA)声子的非谐衰减.分散效应被认为是很小的。我们发现衰变率是非常各向异性的。讨论了在声子聚焦实验中观察到这种各向异性的可能性。
Anharmonic decay of high-energy trans-verse acoustic (TA) phonons satisfyingA"w» kBTis studied tak ing account of the elastic anisotropy of real crystalline solids. Dispersive effects are assumed to be small. We find that the decay rate is very anisotropic. The possibility of observing this anisotropy in a phonon focusing experiment is discussed.