Giant thermoemf in multiterminal superconductor/normal metal mesoscopic   structures
  We considered a mesoscopic superconductor/normal metal (S/N) structure in which the N reservoirs are maintained at different temperatures. It is shown that in the absence of current between the N reservoirs a voltage difference $V_{T}$ arises between the superconducting and normal conductors. The voltage $V_{T}$ oscillates with increasing phase difference $\phi $ between the superconductors, and its magnitude does not depend on the small parameter $(T/\epsilon_{F}).$ 
R. Seviour and A.F. Volkov