  We study the heat and spin transport properties in a ring of interacting
spins coupled to heat baths at different temperatures. We show that
interactions, by inducing avoided crossings, can be a mean to tune both the
total heat current flowing between the ring and the baths, and the way it flows
through the system. In particular, we recognize three regimes in which the heat
current flows clockwise, counter-clockwise, and in parallel. The temperature
bias between the baths also induces a spin current within the ring, whose
direction and magnitude can be tuned by the interaction. Lastly, we show how
the ergotropy of the nonequilibrium steady state can increase significantly
near the avoided crossings.
