Abstract: I will present two novel ideas to control slow magnetization dynamics in nanomagnetic structures. The first is the engineering of energy landscape in an artificial square ice nanostructure, leading to the directional injection and the subsequent propagation of emergent monopole currents. Such a deterministic control of emergent monopole currents may have a role to play in ultrafast computation with nanomagnetism. Additionally, the work on emergent monopole currents led to the eventual observation of ground state in artificial Kagome spin ice structure. The second is on effective topology, a topological environment created by discrete magnetic objects leading to the stabilizing of different magnetic textures, such as a vortex and an anti-vortex structure, in a single permalloy disk. Effective topology is a proposed pathway towards accessing/stabilizing new magnetic textures, such as hopfions, for use in studying fundamental physics and also in applications.

I will conclude the seminar with a brief overview of my current research into magneto transport in thin films of Bismuth supporting unique surface states. I will overview Weak Anti-Localization (WAL) and Rashba Surfaces, both relevant to thin films of Bismuth and our efforts to find evidence for it. Bismuth and its alloys, such as when mixed with Te, Sb, and Sn are exciting for the future of microelectronics, with the tantalizing prospect that these materials may eventually bridge the gap between charge and spin-based devices.