Pair correlation and dynamic JahnTeller effect: HighT_{c} in nanoclusters
Abstract
Electronic states in metallic nanoclusters form energy shells and degree of their filling depends on the number of delocalized electrons. In the region close to halffilling the cluster's geometry oscillates between the prolate and oblate configurations (dynamic JahnTeller effect). For large clusters (N > 10^{2} N is the number of delocalized electrons) this effect competes with pair correlation and, as a result, it is perfectly realistic to observe the transition to the superconducting state. For some clusters (e.g., for Zn_{76}, Al_{70}) the value of the critical temperature is rather high (≳ 140 \text{K}) .
 Publication:

EPL (Europhysics Letters)
 Pub Date:
 November 2014
 DOI:
 10.1209/02955075/108/43001
 arXiv:
 arXiv:1412.6197
 Bibcode:
 2014EL....10843001K
 Keywords:

 Condensed Matter  Superconductivity;
 Condensed Matter  Mesoscale and Nanoscale Physics
 EPrint:
 Europhys.Letters 108,43001 (2014)