On a Possibility to Measure Thermoelectric Power in SNS Structures

TL;DR

This paper explores the theoretical possibility of measuring thermoelectric power in SNS Josephson structures by analyzing the magnetic flux oscillations caused by tiny thermoelectric voltages generated under a small temperature gradient.

Contribution

It introduces a method to estimate thermoelectric power in SNS Josephson junctions through magnetic flux measurements induced by heat flow.

Findings

Magnetic flux oscillates in time due to thermoelectric effects.

The flux value is proportional to temperature difference and junction disparity.

Theoretical framework for thermoelectric power measurement in SNS structures.

Abstract

Two dissimilar Josephson junctions, which are connected to a heater can act as precise batteries. Because of the difference in thermoelectric power of these batteries, circuit with two dissimilar batteries, under heat flow $\Delta T\sim 10^{-5}K$ would have a net EMF $10^{-11} V$ around the zero-resistance loop leading to a loop's magnetic flux oscillating in time. It is shown its theoretical value is proportional to both the temperature difference as well as the disparity in the thermoelectric powers of the two junctions.