Super 0-brane and GS superstring actions on AdS2 x S2

The super 0-brane and GS superstring actions on AdS2 x S2 background with 2-form flux are constructed by taking a supercoset approach. We find that the super 0-brane action contains two parameters which are interpreted as the electric and magnetic charges of the super 0-brane. The obtained super 0-brane action describes the BPS saturated dyonic superparticle moving on AdS2 x S2 background. The WZ action contains the required coupling with 2-form flux. For GS superstring, we find the string action on AdS2 x S2 takes the same form as those in AdS3 x S3 and AdS5 x S5 with RR field background