Phonon propagation with isotope scattering and spontaneous anharmonic decay

Journal Article · Tue May 15 04:00:00 EDT 1990 · Physical Review, B: Condensed Matter; (USA)

DOI:https://doi.org/10.1103/PhysRevB.41.9736· OSTI ID:6736006

Maris, H J ^[1]

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1. Department of Physics, Brown University, Providence, RI (USA)

Calculations of the propagation of high-energy phonons introduced into a crystal at {ital T}=0 K are presented. The phonons are assumed to undergo elastic scattering and anharmonic decay processes. We show that in addition to the quasidiffusion'' component to the phonon propagation (discussed previously by Levinson and co-workers) there is also a contribution that arrives at close to the time expected for ballistic propagation. This latter mode of propagation continues to be of substantial importance even when the elastic scattering is much stronger than the anharmonic processes.

• DOE Contract Number: FG02-88ER40452; FG02-86ER45267
• OSTI ID: 6736006
• Journal Information: Physical Review, B: Condensed Matter; (USA), Journal Name: Physical Review, B: Condensed Matter; (USA) Vol. 41:14; ISSN 0163-1829; ISSN PRBMD
• Country of Publication: United States
• Language: English

Related Subjects

656002* -- Condensed Matter Physics-- General Techniques in Condensed Matter-- (1987-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ABSOLUTE ZERO TEMPERATURE
AMPLITUDES
ANHARMONIC CRYSTALS
CRYSTALS
DECAY AMPLITUDES
ELASTIC SCATTERING
MEAN FREE PATH
PHONONS
QUASI PARTICLES
SCATTERING
TRANSITION AMPLITUDES
WAVE PROPAGATION