Microscopic study of the dipole surface response in large potassium cluster ions

Zeitschrift für Physik D 26, S118 - 121 (1993)

Microscopic study of the dipole surface response in large potassium cluster ions

Angel Rubio, Llorenç Serra

We present microscopic calculations of the response function of large potassium cluster ions to an external dipole field (rY10(theta, phgr)) within different approaches, and with the purpose to compare with recent measurements of the photoabsorption cross section of these systems. Our results indicate that the dipole plasmon energy in these large clusters is almost independent of size, displaying a very slight decrease when going from a size ofN=339 to 913 atoms, and thus deviates from the Mie classical result.

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http://dx.doi.org/10.1007/BF01425637