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31. It 15 shown that the optical phonon population increases nonlinearly with increasing laser field and the rate decreases as the temperature increases.

32. It is indicated that the surface acoustic phonon effect is important.

33. In this work, the empirical dependances of superconducting parameters and phonon spectrum parameters on the Hall Coefficient, and the problem on the Tc in amorphous non-transition metals are studied.

34. Antiferromagnetic transition has soft modulus effect while martensitic transformation also accompanied by a soft phonon mode.

35. The nonlinear lattice dynamics and an expression of nonlinear macroscopic polarization are derived in terms of optic phonon modes.

36. According to the Huang Kun's statistical distribution theory of phonons (1982), the phonon probability factors and the average numbers of phonons at 4.2K and 20K are exactly calculated.

37. Thequasi equilibrium relaxation occurs via elastic and inelastic scattering and the emission of longitudinal optical phonon.

38. Antiferromagnetic transition has soft modulus effect while martensitic transformation is also accompanied by a soft phonon mode.

39. For weak coupling, we obtain the usual result that the groung state energy is the sum of the contribution of different phonon branches. For st...