Journal
PHYSICAL REVIEW B
Volume 88, Issue 10, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.88.104305
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Funding
- JSPS [25400394]
- [NSF-DMR-0906491]
- Division Of Materials Research
- Direct For Mathematical & Physical Scien [0906491] Funding Source: National Science Foundation
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The possibility of thermal excitation of intrinsic localized modes (ILMs) arising from anharmonicity in ionic perfect crystals is studied numerically for realistic model systems in one and three dimensions. Implications are discussed for an interesting high-temperature feature seen in earlier inelastic neutron scattering experiments on single crystal NaI. The general conclusion is that ILM formation energies are far too large for thermal excitation of ILMs to account for the observed feature in a pure crystal.
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