Thermoelectric Effects in S-N-S Weak Links with Heavy Fermions as The Normal Metal: A Possibility for Thermosensors

Abstract

It is shown that S-N-S weak links with an heavy-fermion metal as the weak link (N) can be useful thermosensors. This property is due to the large thermopower of heavy-fermion metals which is of the order 10^(-6) V/K. The longitudinal sound can also generate voltage oscillation due to the large Grueneisen parameter, $Ω_{hf}\sim 10^{2}$, in heavy-fermions. Similar effects are expected with other Kondo systems as the weak link.