Supplementary Materials Observation of Acoustic Spin Skyrmion in Confined Sound Field with Orbital Angular Momentum

1. The mapping relationship of spin skyrmion mode from three-dimensional parameterized sphere to two-dimensional real space. 2. Vector distributions and the profiles of spin field vectors for 3rd-order Néel-type skyrmion modes formed by acoustic spin fields. 3. The case of an excitation source that is the clockwise acoustic spin source. 4. Quantitative analysis of specific Q factor variation results.