  We show that both the baryon asymmetry of the universe and dark matter (DM)
can be accounted for by the dynamics of a single axion-like field. In this
scenario, the observed baryon asymmetry is produced through spontaneous
baryogenesis---driven by the early evolution of the axion---while its late-time
coherent oscillations explain the observed DM abundance. Typically, spontaneous
baryogenesis via axions is only successful in regions of parameter space where
the axion is relatively heavy, rendering it highly unstable and unfit as a dark
matter candidate. However, we show that a field-dependent wavefunction
renormalization can arise which effectively "deforms" the axion potential,
allowing for efficient generation of baryon asymmetry while maintaining a light
and stable axion. Meanwhile, such deformations of the potential induce
non-trivial axion dynamics, including a tracking behavior during its
intermediate phase of evolution. This attractor-like dynamics dramatically
reduces the sensitivity of the axion relic abundance to initial conditions and
naturally suppresses DM isocurvature perturbations. Finally, we construct an
explicit model realization, using a continuum-clockwork axion, and survey the
details of its phenomenological viability.
