Applied electric field instead of pressure in H-based superconductors

TL;DR

This paper proposes a theoretical approach showing that applying an electric field can enhance the critical temperature of hydride superconductors, potentially reaching near 300K without increasing pressure.

Contribution

It introduces a novel theoretical framework demonstrating electric fields can replace pressure in boosting superconducting critical temperatures in hydrides.

Findings

Electric field penetrates and influences Cooper pair Bose condensation.

Applying electric field can raise the critical temperature above the pressure-induced value.

Potential to achieve near 300K superconductivity in carbonaceous sulfur hydride at high pressure.

Abstract

In our desire to give a new suggestion for H-based superconductors experiments we present a theoretical framework for understanding the impact of an applied electric field on pressured hydride superconductors. We study a material at pressure $p$, when it possesses insulator-superconductor transition, at the respective superconducting critical temperature $T_{cr}$. The theory shows the applied electric field penetrates the material and forces the Cooper pairs to Bose condensate. If one applies an electric field and then increases the temperature, the theory predicts novel critical temperature $T^{el}_{cr}$ higher than $T_{cr}$. Therefore, the system has a higher superconducting critical temperature if we apply an electric field instead of increasing the pressure. The result shows that in the case of carbonaceous sulfur hydride at $234Gpa$ and near but below critical temperature $T_c=283K$, applying a sufficiently strong electric field, we can bring the superconducting critical temperature close to 300K.