Superconducting platinum silicide for electron cooling in silicon
  We demonstrate electron cooling in silicon using platinum silicide as a superconductor contact to selectively remove the highest energy electrons. The superconducting critical temperature of bulk PtSi is reduced from around 1 K to 0.79 K using a thin film (10 nm) of PtSi, which enhances cooling performance at lower temperatures and enables electron cooling to be demonstrated from 100 mK to 50 mK. 
M J Prest, J S Richardson-Bullock, Q T Zhao, J T Muhonen, D   Gunnarsson, M Prunnila, V A Shah, T E Whall, E H C Parker and ...
cond-mat.mes-hall