ISSN:
0392-6737
Keywords:
BCS theory
;
applications
;
Atomic and molecular clusters
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Summary The particle number projecting method for the description of pairing effects in metal clusters is proposed. In contrast with the Bardeen-Cooper-Schrieffer method (BCS) which does not conserve the particle number (thus not providing the necessary accuracy of calculations for small clusters) and has no solutions at sufficiently weak pairing, the projecting method can be applied to both small and large clusters with any pairing strength. As an example, the projection method is used to check the assertion on the pairing origin of the odd-even staggering (OES) in the ionization potentials (IP) of sodium clusters. Both effects of pairing and shape deformation are taken into account simultaneously. In general, the results obtained show that the existence of pairing in sodium clusters is doubtful.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF02453255
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