Vibrational properties of sodium microclusters

The structural and vibrational properties of Nan (n=2–8) microclusters at very low temperature (T≈0.1 K) are analyzed by tight-binding molecular dynamics simulations. By using the Fourier transform of the velocity autocorrelation function from the trajectories of tight-binding molecular dynamics, the present model is successful in predicting some of the experimental, far infrared spectra and agrees very well with a standard finite difference harmonic method and some other more sophisticated calculations.