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29 March 2024
 
  » pubmed » pmid11178057

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Origin of the boson peak in systems with lattice disorder
S N Taraskin ; Y L Loh ; G Natarajan ; S R Elliott ;
Date 12 Feb 2001
Journal Phys Rev Lett, 86 (7), 1255-8
AbstractThe origin of the boson peak in models with force-constant disorder has been established by calculations using the coherent potential approximation. The analytical results obtained are supported by precise numerical solutions. The boson peak in the disordered system is associated with the lowest van Hove singularity in the spectrum of the reference crystalline system, pushed down in frequency by disorder-induced level-repelling and hybridization effects.
Source PubMed, pmid11178057
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