http://phys.org/news/2012-06-copper-fields-quantum-criticality-high-t...
> Superconductivity is a complex phenomenon that is considerably more intricate than many casual observers realize. This caveat applies equally to the subset of this research known as high-temperature superconductivity – which, it should be noted, is described as such only in relation to the near absolute zero temperature range at which conventional superconductors are found, and furthermore is not to be confused with the loftier goal of room-temperature superconductivity.