Signatures in the conductance for phase transitions in excitonic systems

TL;DR

This paper investigates conductance signatures associated with two phase transitions in exciton bilayer systems, including a topological transition with Majorana fermions and a Wigner crystal transition, proposing conductance measurements as a detection method.

Contribution

It introduces a simple model framework to identify conductance signatures of these phase transitions in excitonic systems, facilitating experimental detection.

Findings

Conductance signatures can distinguish topological and Wigner crystal phases.

Simple models predict observable conductance changes at phase transitions.

Proposes conductance measurement as a practical detection method.

Abstract

We analyse two phase transitions in exciton bilayer systems: a topological phase transition to a phase which hosts Majorana fermions and a phase transition to a Wigner crystal. Using generic simple models for the different phases we discuss the conductance properties of the latter when contacted to metallic leads and demonstrate the possibility to observe the different phase transitions by simple conductance measurements.