These two articles are suggestive when read in conjunction with one another:
http://phys.org/news/2012-07-synchrotrons-superconductors-cold.html "The team found the first experimental evidence that a so-called 'charge-density-wave instability' competes with superconductivity." http://phys.org/news/2011-01-material-superconductor.html#nRlv "This must mean that they [electrons] were essentially already synched in the non-superconductor, but something was preventing them from sliding around with zero resistance. The precisely tuned laser light removes the frustration, unlocking the superconductivity." Eric
