Superconductivity at Any Temperature

TL;DR

This paper presents a 2+1D model that achieves superconductivity at any temperature by using a Chern-Simons term and a magnetic field, potentially guiding toward room temperature superconductivity.

Contribution

It introduces a novel 2+1D theoretical model with a Chern-Simons mixing term enabling superconductivity at all temperatures, controlled by magnetic field strength.

Findings

Superconductivity persists at all temperatures in the model.

Critical temperature scales with magnetic field strength.

Phase transition involves Berezinsky-Kosterlitz-Thouless behavior.

Abstract

We construct a 2+1 dimensional model that sustains superconductivity at all temperatures. This is achieved by introducing a Chern Simons mixing term between two Abelian gauge fields A and Z. The superfluid is described by a complex scalar charged under Z, whereas a sufficiently strong magnetic field of A forces the superconducting condensate to form at all temperatures. In fact, at finite temperature, the theory exhibits Berezinsky-Kosterlitz-Thouless phase transition due to proliferation of topological vortices admitted by our construction. However, the critical temperature is proportional to the magnetic field of A, and thus, the phase transition can be postponed to high temperatures by increasing the strength of the magnetic field. This model can be a step towards realizing the long sought room temperature superconductivity.