Evidence for High Tc Superconducting Transitions in Isolated Al45- and Al47- Nanoclusters

Details Evidence for High Tc Superconducting Transitions in Isolated Al45- and Al47- Nanoclusters Evidence for High Tc Superconducting Transitions in Isolated Al45- and Al47- Nanoclusters

2008-04-05

arxiv.org/abs/0804.0824v1

Physics

Condensed Matter

Superconductivity

Scientific paper

Heat capacities measured for Al45- and Al47- 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 Tc superconducting state. An analysis based on a theoretical treatment of pairing in Al45- and Al47- 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.

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