Intrinsic Localized Modes in Anharmonic Crystals
- 22 August 1988
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 61 (8) , 970-973
- https://doi.org/10.1103/physrevlett.61.970
Abstract
A new kind of localized mode is proposed to occur in a pure anharmonic lattice. Its localization properties are similar to those of a localized mode for a force-constant defect in a harmonic lattice. These modes, which are thermally generated like vacancies but with much smaller activation energies, may appear at cryogenic temperatures in strongly anharmonic solids such as quantum crystals as well as in conventional solids.Keywords
This publication has 13 references indexed in Scilit:
- Specific heat of bccPhysical Review B, 1977
- Defect-induced resonance modes in the asymptotic limit of low frequencies: Isotope effects and amplitude patternsPhysical Review B, 1974
- A Theory of the Lattice Vibration of Anharmonic SolidsProgress of Theoretical Physics Supplement, 1970
- Theory of Quantum CrystalsAmerican Journal of Physics, 1969
- Calculation of Phonon Frequencies and Thermodynamic Properties of Crystalline bcc HeliumPhysical Review B, 1967
- Heat Capacity of hcp and bcc Solid Helium 3Physical Review B, 1967
- Theory of Quantum CrystalsPhysical Review B, 1966
- Isotope Shift of a Low-Lying Lattice Resonant ModePhysical Review B, 1965
- Heat Capacity of SolidPhysical Review B, 1962
- Lattice imperfections, isotopic ordering and nuclear spin interaction in solid helium as shown by specific heat measurementsPhysics Letters, 1962