Computer Simulation of Electronic Device for Generation of Electric Oscillations by Negative Differential Conductivity of Supercooled Nanostructured Superconductors in Electric Field

TL;DR

This paper uses computer simulations to explore how nanostructured superconductors can generate high-frequency electric oscillations due to negative differential conductivity, suggesting potential terahertz applications.

Contribution

It provides explicit analytical expressions for superconductor conductivity and demonstrates the feasibility of terahertz oscillations in a simulated circuit with nanostructured superconductors.

Findings

Negative differential conductivity leads to electric oscillations.

Simulated gigahertz oscillations suggest terahertz potential.

Thermal boundary resistance is considered in simulations.

Abstract

We use the formerly derived explicit analytical expressions for the conductivity of nanostructured superconductors supercooled below the critical temperature in electric field. Computer simulations reveal that the negative differential conductivity region of the current-voltage characteristic leads to excitation of electric oscillations. We simulate a circuit with distributed elements as a first step to obtain gigahertz oscillations. This gives a hint that a hybrid device of nanostructured superconductors will work in terahertz frequencies. If the projected setup is successful, we consider the possibility for it to be put in a nanosatellite (such as a CubeSat). A study of high temperature superconductor layers in space vacuum and radiation would be an important technological task. The interface thermal boundary resistance is taken into account in the numerical illustrations for the work of the device.