Harmonics generation and chaos in scattering of phonons from anharmonic surfaces |
| |
Authors: | P Zieliński Z Lodziana T Srokowski |
| |
Institution: | (1) Institute of Nuclear Physics, ul. Radzikowskiego 152, 31-342 Kraków, Poland, PL |
| |
Abstract: | The effective equations of motion for a surface atom in an anharmonic surface potential have been derived for dispersionless
one-dimensional substrates. The system is equivalent to a non-linear damped oscillator (Duffing oscillator) with the forcing
term depending on the form of the incident wave. Efficiency of harmonics generation, phonon reflection coefficients, effective
local density of states, regions of chaotic motion and windows of periodic motion have been comparatively evaluated for the
system subject to an oscillating external force and to the irradiation by a monochromatic phonon coming from the bulk. Comparison
of the resonant desorption of the surface atom within a given time interval has been made for the same example of anharmonic
surface potential in both types of perturbation.
Received 9 November 1998 |
| |
Keywords: | PACS 68 35 Ja Surface and interface dynamics and vibrations - 65 50 +m Thermodynamic properties and entropy - 79 70 +q Field emission ionization evaporation and desorption |
本文献已被 SpringerLink 等数据库收录! |