Yunkun's paper entitled "Anatomy of nanomagnetic switching at a 3D topological insulator PN junction (link)" published in Scientific Reports. In this paper, Y. Xie et al. analyze how spins filtered at an in-plane topological insulator PN junction (TIPNJ) interact with a nanomagnet, and argue that the intrinsic charge-to-spin conversion does not translate to an external gain if the nanomagnet also acts as the source contact.