Collective multipole excitations in small metal particles: Critical angular momentum l/sup cr/ for the existence of collective surface modes
The electronic multipole response properties of small metal particles are investigated within the frame of a self-consistent spherical jellium model. The method used is the time-dependent local-density approximation (TDLDA), which was used before in a study of the dipole response (W. Ekardt, Phys. Rev. Lett. 52, 1925 (1984)). On comparing the TDLDA response with the response of a system of noninteracting electrons, we see clearly how the electron-electron interaction is switched off rather suddenly around a critical angular momentum l/sup cr/. It is shown that the value of l/sup cr/ can be obtained from the equation q/sup cr/ = l/sup cr//R, where R is the radius of the jellium background and q/sup cr/ is the critical wave vector of the planar jellium surface. This result is consistent with a result found earlier for l = 1 (W. Ekardt, Phys. Rev. B 31, 6360 (1985)): A spherical surface behaves across the jellium edge like a patch of a planar jellium surface.
- Research Organization:
- Solid State Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831 and Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, D-1000 Berlin West 33, West Germany
- OSTI ID:
- 5511447
- Journal Information:
- Phys. Rev. B: Condens. Matter; (United States), Journal Name: Phys. Rev. B: Condens. Matter; (United States) Vol. 32:4; ISSN PRBMD
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ANGULAR MOMENTUM
COLLECTIVE EXCITATIONS
CONFIGURATION
ELECTROMAGNETIC RADIATION
ELECTRON-ELECTRON COUPLING
ELEMENTS
ENERGY-LEVEL TRANSITIONS
EXCITATION
METALS
MULTIPOLE RADIATION
OPTICAL PROPERTIES
PARTICLES
PHYSICAL PROPERTIES
RADIATIONS
SPHERICAL CONFIGURATION