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: Anharmonicity, Two-Phonon Scattering, and Multiple Gaps

✍ Scribed by Liu, Amy Y.; Mazin, I. I.; Kortus, Jens

Book ID
121486399
Publisher
The American Physical Society
Year
2001
Tongue
English
Weight
166 KB
Volume
87
Category
Article
ISSN
0031-9007

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In the present paper a two-phonon spectrum in the frequency region of the sum or difference of the frequencies of two optical phonons is studied. A quartic anharmonicity is investigated as a factor for damping of the one-and two-phonon states as well as a mechanism binding two phonons into a biphono