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Orbital magnetism in axially deformed sodium clusters

From scissors mode to dia-para magnetic anisotropy
  • V. O. NesterenkoEmail author
  • W. Kleinig
  • P.-G. Reinhard
  • N. Lo Iudice
  • F. F. de Souza Cruz
  • J. R. Marinelli
OriginalPaper

Abstract.

Low-energy orbital magnetic dipole excitations, known as the scissors mode (SM), are studied in alkali metal clusters. Subsequent dynamic and static effects are explored. The treatment is based on a self-consistent microscopic approach using the jellium approximation for the ionic background and the Kohn-Sham mean field for the electrons. The microscopic origin of SM and its main features (structure of the mode in light and medium clusters, separation into low- and high-energy plasmons, coupling high-energy M1 scissors and E2 quadrupole plasmons, contributions of shape isomers, etc.) are discussed. It is shown that the scissors M1 strength acquires large values with increasing cluster size. The mode is responsible for the van Vleck paramagnetism of spin-saturated clusters. Quantum shell effects induce a fragile interplay between Langevin diamagnetism and van Vleck paramagnetism and lead to a remarkable dia-para anisotropy in magnetic susceptibility of particular light clusters. Finally, several routes for observing the SM experimentally are discussed.

Keywords

Magnetic Susceptibility Microscopic Approach Ionic Background Shell Effect Microscopic Origin 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Berlin/Heidelberg 2003

Authors and Affiliations

  • V. O. Nesterenko
    • 1
    Email author
  • W. Kleinig
    • 1
    • 2
  • P.-G. Reinhard
    • 3
  • N. Lo Iudice
    • 4
  • F. F. de Souza Cruz
    • 5
  • J. R. Marinelli
    • 5
  1. 1.Bogoliubov Laboratory of Theoretical PhysicsJoint Institute for Nuclear ResearchDubna, Moscow regionRussia
  2. 2.Institut für AnalysisTechnische Universität DresdenDresdenGermany
  3. 3.Institut für Theoretische PhysikUniversität ErlangenErlangenGermany
  4. 4.Dipartimento di Scienze FisicheUniversità di Napoli “Federico II”, Istituto Nazionale di Fisica NucleareNapoliItaly
  5. 5.Departamento de FisicaUniversidade Federal de Santa CatarinaFlorianópolisBrazil

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