Alright, there is some experimental evidence for subshell switching as
the cause of superconduction. The technique of photoelectron
spectroscopy has been used on superconductors
as the below reference reveals.
--- quoting from website ---
http://www.fys.ku.dk/~jjensen/Book/lynch.pdf
Photoelectron Spectroscopy of Cuprate
Superconductors
David W. Lynch and Clifford G. Olson
Department of Physics and Astronomy and Ames Laboratory, USDOE,
Iowa State University, Ames IA 50011
Abstract
We present a review of the current status of angle-resolved
photoelectron spectroscopy of the
valence bands of cuprate superconductors, including results from the
first half of 1996.
--- end quote ---
Although the paper never lists a subshell switch of a cuprate
superconductor, it does mention the idea of holes or electron carriers
as cited in 5.3 n-type cuprates with the listing of Nd cuprate of 25
K.
So it is not as if there is no work on subshell switching, but rather,
there is work available and there is no proper interpretation of the
work going on.
So that if we can see the transition temperature as that of a
switching of subshells, then we have pinpointed the mechanism of
superconduction.
The article starts off by saying that photoelectron spectroscopy could
not be carried out on traditional superconductors, but that was 1996,
and perhaps by 2012 we can do such experiments on palladium at 3 K and
mercury at 4 K and niobium at 9 K.
Archimedes Plutonium
http://www.iw.net/~a_plutonium
whole entire Universe is just one big atom
where dots of the electron-dot-cloud are galaxies