Year: 2016
Type: article
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 $\mathcal{A}$ and $\mathcal{Z}$. The superfluid is described by a complex scalar charged under $\mathcal{Z}$, whereas a sufficiently strong magnetic field of $\mathcal{A}$ 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 $\mathcal{A}$, and thus, the phase transition can be postponed to high temperatures by increasing the strength of the magnetic field.
Institution: École Polytechnique Fédérale de Lausanne
Language: English
Subfield: Condensed Matter Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W1844804255