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An Evaluation of Long-Wavelength Surface Plasmon Dispersion Coefficient ‘alpha' for Various Simple Metal Surfaces

Santosh Kumar and L. K. Mishra

This paper presents an evaluation of long wavelength surface plasmon dispersion coefficients α (Ǻ) for various simple metal surfaces using various models (HD, SRM, IBM, RPA and ALDA). It was observed that the surface plasmon dispersion coefficient ‘α’ evaluated using RPA and ALDA models are negative as per experimental observation but the magnitude is large. On the other hand, ‘α’ calculated from HD and SRM models are positive but the magnitude matches with experimental data.