  Baryogenesis at the electroweak scale depends on divers but identifiable
details of bubble wall dynamics and the particle physics. We show that
inclusion of the dynamics of relative phase in two-Higgs-doublet model (2HDM)
enhances the adiabatic order of the mechanism proposed by
McLerran-Shaposhnikov-Turok-Voloshin where the scalar-scalar-vector triangle
diagram with top quark in the loop gives rise to a significant contribution to
the effective chemical potential biasing the Chern-Simons number. We also show
that in 2HDM with less stringent constraints on Yukawa couplings than those
imposed by natural flavour conservation, there are additional diagrams
contributing to the effective chemical potential. These two effects can combine
with several others to produce adequate baryon asymmetry at the electroweak
scale.
