Nanotechnological structure for observation of current induced contact potential difference and creation of effective Cooper pair mass-Spectroscopy

•It is proposed a creation of Cooper pair mass spectroscopy based on current induced contact potential difference.•A numerical example of the suggested set-up is analyzed in detail.•Like the lift force of the airplane, the Bernoulli potential in superconductors is proportional to the square of thecurrent.•The Cooper pair mass was proclaimed as an inaccessible parameter, but its determination requires measurement ofseveral nV.•Without the Cooper pair mass physics of superconductivity remains Hamlet without the Prince, only with anonnagata in the role of Ofelia. Changes of the electron work-function of a superconductor proportional to the square of the current density Δϕ=−βj2 are known as Bernoulli effect in superconductors or current induced Contact Potential Difference (CPD). The temperature dependent coefficient β(T; m*) is parametrized by the effective mass of Cooper pairs m*. In such a way the study of the Bernoulli effect leads to creation of Cooper pair mass-spectroscopy. In this paper a short review on the Bernoulli effect in superconductors is given and a proposed experimental set-up for its measurement is described in detail. The experiment requires standard electronic equipment and can be implemented in every laboratory related to physics of superconductivity. This experimental set-up for observation of current induced CPD requires nano-technological hybrid superconductor structures with atomically clean interfaces and measurement of nano-volt signals with capacitive coupling to the sample. As the quality of the superconductor surface is crucial for the proposed experiment the research is better to start with crystals used for angle-resolved photo-emission spectroscopy (ARPES); all those samples have excellent quality guarantying success even for the first experiment.