Signatures in the conductance for phase transitions in excitonic systems

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.

5 pages, 4 figures, accepted for publication in Modern Physics Letters B