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Evidence for High T C Superconducting Transitions in Isolated Al 45 and Al 47 Nanoclusters

  • Baopeng Cao
  • Colleen M. Neal
  • Anne K. Starace
  • Yurii N. Ovchinnikov
  • Vladimir Z. Kresin
  • Martin F. Jarrold
Article

Abstract

Heat capacities measured for Al 45 and Al 47 nanoclusters have reproducible jumps at ∼200 K. These jumps are consistent with theoretical predictions that some clusters with highly degenerate electronic states near the Fermi level will undergo a transition into a high T C superconducting state. An analysis based on a theoretical treatment of pairing in Al 45 and Al 47 agrees well with the experimental data in both the value of the critical temperature and in the size and width of the jumps in the heat capacity.

Keywords

Nanoclusters Peaks in the heat capacity Pairing transition 

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Copyright information

© Springer Science+Business Media, LLC 2008

Authors and Affiliations

  • Baopeng Cao
    • 1
  • Colleen M. Neal
    • 1
  • Anne K. Starace
    • 1
  • Yurii N. Ovchinnikov
    • 2
  • Vladimir Z. Kresin
    • 3
  • Martin F. Jarrold
    • 1
  1. 1.Chemistry DepartmentIndiana UniversityBloomingtonUSA
  2. 2.L. Landau Institute for Theoretical PhysicsMoscowRussia
  3. 3.Lawrence Berkeley LaboratoryUniversity of CaliforniaBerkeleyUSA

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