> Hello, mems member > Studying acoustic phonon for thermal conductivity, I faced a problem. I know that the acoutic phonon is the quantized mode of vibration occuring in the atomic lattice of a solid. However, I don't know how the initial atomic vibration happen by thermal energy: the first vibration of one atom. I think when an atom get the thermal energy by heating, the energy well is fluctuated, and next the nuclei starts to move. I think this is the mechanism of the initial atomic vibration of one atom by thermal energy. I wish to know whether my understanding is right or not. Could you let me have your answer? Thank you very much. Ickchan Kim > -- > Ickchan Kim Office Phone: (979)845-9598 > ickim@tamu.edu C.P.# : (979)574-4179 > > Office: ENPH #401, Conduction Heat Transfer Lab. > Department of Mechanical Engineering, Texas A&M University > College Station, Texas 77843-3123 > > > > -- Ickchan Kim Office Phone: (979)845-9598 ickim@tamu.edu C.P.# : (979)574-4179 Office: ENPH #401, Conduction Heat Transfer Lab. Department of Mechanical Engineering, Texas A&M University College Station, Texas 77843-3123