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Title of Journal: Zeitschrift für Physik B Condensed Matter

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Abbravation: Zeitschrift für Physik B Condensed Matter

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Springer-Verlag

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DOI

10.1007/bf01991443

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1431-584X

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Multiphonon decay of strong mode in quantum lattic

Authors: V Hizhnyakov
Publish Date: 2014/02/10
Volume: 104, Issue: 4, Pages: 675-679
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Abstract

A nonperturbative theory of multiphonon anharmonic decay of strongly excited local mode is developed whereby the mode is considered classically and phonons quantum mechanically The decay rate of the mode is expressed via the negative frequency parts of the phonon pair correlation functions In the case of twophonon decay the later satisfy the linear integral equations while in the case of two and morephonon decay they satisfy the nonlinear integral equations As a result the processes mentioned differently depend on the mode amplitude A twophonon processes smoothly deminish if A → ∞ while three and morephonon processes are fully switchedoff at large amplitudes and they abruptly switchon if the amplitude approaches the critical value At that the decay rate gets rather high value of the order of the mode quantum per period The final stage of the relaxation is well described by the perturbation theory

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Other Papers In This Journal:
  1. On the critical temperature of non-periodic Ising models on hexagonal lattices
  2. On the critical temperature of non-periodic Ising models on hexagonal lattices
  3. Effect of preparation on Hg−Ba−Ca−Cu−O superconductors
  4. Structural relaxation and viscous flow in amorphous ZrAlCu
  5. Nonequilibrium statistical mechanical formulation for grain growth
  6. Ions and atoms in superfluid helium ( 4 He)
  7. Microcanonical ensemble study of a gas column under gravity
  8. Shift of the Bragg position in grazing-incidence diffraction
  9. Electrical field induced growth of triangular nanometer structures on WSe 2
  10. Andreev reflexion at nanocontacts of superconducting AuIn 2 with copper
  11. Nature of coherent enhancement of inelastic electron scattering from disordered media
  12. Optical mode crossings and the low temperature anomalies of SrTiO 3
  13. Andreev reflexion at nanocontacts of superconducting AuIn 2 with copper
  14. Interrelations between various frustrated Ising- and q -state-models
  15. The Hume-Rothery rules and phase stabilities in noble metal alloys
  16. Instabilities of weakly correlated electronic gas on a two dimensional lattice
  17. Non-Fermi-liquid behavior and d-wave superconductivity near the charge-density-wave quantum critical point
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