Evidence for High Tc Superconducting Transitions in Isolated Al45- and Al47- Nanoclusters
Abstract
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.
- Publication:
-
arXiv e-prints
- Pub Date:
- April 2008
- DOI:
- 10.48550/arXiv.0804.0824
- arXiv:
- arXiv:0804.0824
- Bibcode:
- 2008arXiv0804.0824C
- Keywords:
-
- Condensed Matter - Superconductivity;
- Physics - Atomic and Molecular Clusters