  Ample numerical evidence from lattice calculations shows a strong connection
between the confining properties of gauge theories at finite temperature and
the localisation properties of the low-lying Dirac eigenmodes. In this
contribution we discuss recent progress on this topic, focussing on results for
QCD at imaginary chemical potential ${\mu}_I/T = \pi$ at temperatures above the
Roberge-Weiss transition temperature. These confirm the general picture of low
modes turning from delocalised to localised at the deconfinement transition, in
a previously unexplored setup with a genuine, physical transition in the
presence of dynamical fermions. This further supports the use of Dirac
eigenmodes as a tool to investigate the mechanisms behind confinement and the
deconfinement transition.
