Wave spectra of 2D Yukawa solids and liquids in the presence of a magnetic field

摘要

Thermally excited phonon spectra of 2D Yukawa solids and liquids in thepresence of an external magnetic field are studied using computer simulations.Special attention is paid to the variation of wave spectra in terms of severalkey parameters, such as the strength of coupling, the screening parameter, andthe intensity of the magnetic field. In addition, comparisons are made withseveral analytical theories, including random-phase approximation,quasi-localized charge approximation, and harmonic approximation, and thevalidity of those theories is discussed in the present context.