Condensed Matter Seminar Series

Jörg Schmalian

Karlsruhe Institute of Technology

Topologically Enables Superconductivity

Static zero modes are a much sought-after consequence of one-dimensional topological superconductivity. Here, we show that, in turn, zero modes accompanying dynamical instanton events strongly enhance—in some cases even enable—superconductivity. We find that the dynamics of a one-dimensional topological triplet superconductor is governed by a topological term in the field theory. For isotropic triplets, this term enables algebraic charge-2e superconductivity, which is destroyed by fluctuations in nontopological superconductors. We present predictions of correlation functions and thermodynamics for states of topologically enhanced superconductivity.