  The controllable magnetic skyrmion motion represents a highly concerned issue
in preparing advanced skyrmion-based spintronic devices. Specifically,
magnon-driven skyrmion motion can be easily accessible in both metallic and
insulating magnets, and thus is highly preferred over electric current control
further for the ultra-low energy consumption. In this work, we investigate
extensively the dynamics of skyrmion motion driven by magnon in an
antiferromagnet using the collective coordinate theory, focusing on the effect
of magnon polarization. It is revealed that the skyrmion Hall motion driven by
circularly polarized magnon becomes inevitable generally, consistent with
earlier report. Furthermore, the elastic scattering theory and numerical
results unveil the strong inter-dependence between the linearly polarized
magnon and skyrmion motion, suggesting the complicated dependence of the
skyrmion motion on the polarization nature of driving magnon. On the reversal,
the scattering from the moving skyrmion may lead to decomposition of the
linearly polarized magnon into two elliptically polarized magnon bands.
Consequently, a net transverse force acting on skyrmion is generated owing to
the broken mirror symmetry, which in turn drives a skyrmion Hall motion. The
Hall motion can be completely suppressed only in some specific condition where
the mirror symmetry is preserved. The present work unveils non-trivial
skyrmion-magnon scattering behavior in antiferromagnets, advancing the
antiferromagnetic spintronics and benefiting to high-performance devices.
