Eur. Phys. J. B (2022) 95: 46
https://doi.org/10.1140/epjb/s10051-022-00311-2

Regular Article - Solid State and Materials

Applied electric field instead of pressure in H-based superconductors

Department of Physics, University of Sofia, 1126, Sofia, Bulgaria

^a naoum@phys.uni-sofia.bg

Received: 17 February 2022
Accepted: 1 March 2022
Published online: 11 March 2022

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 $T_{\mathit{cr}}$. 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 $T_{\mathit{cr}}^{\mathit{el}}$ higher than $T_{\mathit{cr}}$. 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 300 K.